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Drip Faucet worksheet

Grades 6–7 · CCSS 6.RP.A.3.b, 6.RP.A.3.d

Solve each problem and show your work. Round answers to 2 decimal places where needed.

1.
Problem 1.
- Drips per minute: 9
- Volume of one drop (common approximation: 0.05 mL): 0.06 mL
- Number of faucets dripping like this: 2
- Water price (example: $6 per 1,000 gal): $5 per 1,000 US gallons
Find: Water wasted per year
Answer
2.
Problem 2.
- Drips per minute: 8
- Volume of one drop (common approximation: 0.05 mL): 0.03 mL
- Number of faucets dripping like this: 1
- Water price (example: $6 per 1,000 gal): $7 per 1,000 US gallons
Find: Water wasted per year
Answer
3.
Problem 3.
- Drips per minute: 12
- Volume of one drop (common approximation: 0.05 mL): 0.04 mL
- Number of faucets dripping like this: 1
- Water price (example: $6 per 1,000 gal): $5 per 1,000 US gallons
Find: Water wasted per year
Answer
4.
Problem 4.
- Drips per minute: 11
- Volume of one drop (common approximation: 0.05 mL): 0.05 mL
- Number of faucets dripping like this: 2
- Water price (example: $6 per 1,000 gal): $7 per 1,000 US gallons
Find: Water wasted per year
Answer
5.
Problem 5.
- Drips per minute: 12
- Volume of one drop (common approximation: 0.05 mL): 0.06 mL
- Number of faucets dripping like this: 2
- Water price (example: $6 per 1,000 gal): $5 per 1,000 US gallons
Find: Water wasted per year
Answer
6.
Problem 6.
- Drips per minute: 11
- Volume of one drop (common approximation: 0.05 mL): 0.06 mL
- Number of faucets dripping like this: 1
- Water price (example: $6 per 1,000 gal): $6 per 1,000 US gallons
Find: Water wasted per year
Answer
7.
Problem 7.
- Drips per minute: 7
- Volume of one drop (common approximation: 0.05 mL): 0.05 mL
- Number of faucets dripping like this: 1
- Water price (example: $6 per 1,000 gal): $7 per 1,000 US gallons
Find: Water wasted per year
Answer
8.
Problem 8.
- Drips per minute: 9
- Volume of one drop (common approximation: 0.05 mL): 0.05 mL
- Number of faucets dripping like this: 1
- Water price (example: $6 per 1,000 gal): $5 per 1,000 US gallons
Find: Water wasted per year
Answer
9.
Problem 9.
- Drips per minute: 12
- Volume of one drop (common approximation: 0.05 mL): 0.05 mL
- Number of faucets dripping like this: 1
- Water price (example: $6 per 1,000 gal): $6 per 1,000 US gallons
Find: Water wasted per year
Answer
10.
Problem 10.
- Drips per minute: 9
- Volume of one drop (common approximation: 0.05 mL): 0.05 mL
- Number of faucets dripping like this: 1
- Water price (example: $6 per 1,000 gal): $6 per 1,000 US gallons
Find: Water wasted per year
Answer

Answer key: Drip Faucet worksheet

1. Water wasted per year: 150 US gal
1. Water lost per minute = drips × drop volume × faucets
  $9 \times 0.06 mL \times 2$ $= 1.08 mL$
2. Scale up to a full day: multiply by the 1,440 minutes in a day, then turn mL into liters
  $\frac{1.08 mL \times 1,440}{1,000}$ $= 1.5552 L$
3. Multiply the daily loss by 365 to see the total over a whole year
  $1.5552 L \times 365$ $= 567.648 L$
4. Convert to US gallons (1 US gal = 3.785411784 L)
  $\frac{567.648 L}{3.785411784}$ $= 149.957 US gal$
5. Yearly cost = liters ÷ liters per billing unit (1,000 US gal = 3,785.411784 L) × price
  $\frac{567.648}{3,785.411784} \times $5.00$ $= $0.75$
2. Water wasted per year: 33.3 US gal
1. Water lost per minute = drips per minute × drop volume
  $8 \times 0.03 mL$ $= 0.24 mL$
2. Scale up to a full day: multiply by the 1,440 minutes in a day, then turn mL into liters
  $\frac{0.24 mL \times 1,440}{1,000}$ $= 0.3456 L$
3. Multiply the daily loss by 365 to see the total over a whole year
  $0.3456 L \times 365$ $= 126.144 L$
4. Convert to US gallons (1 US gal = 3.785411784 L)
  $\frac{126.144 L}{3.785411784}$ $= 33.324 US gal$
5. Yearly cost = liters ÷ liters per billing unit (1,000 US gal = 3,785.411784 L) × price
  $\frac{126.144}{3,785.411784} \times $7.00$ $= $0.23$
3. Water wasted per year: 66.6 US gal
1. Water lost per minute = drips per minute × drop volume
  $12 \times 0.04 mL$ $= 0.48 mL$
2. Scale up to a full day: multiply by the 1,440 minutes in a day, then turn mL into liters
  $\frac{0.48 mL \times 1,440}{1,000}$ $= 0.6912 L$
3. Multiply the daily loss by 365 to see the total over a whole year
  $0.6912 L \times 365$ $= 252.288 L$
4. Convert to US gallons (1 US gal = 3.785411784 L)
  $\frac{252.288 L}{3.785411784}$ $= 66.647 US gal$
5. Yearly cost = liters ÷ liters per billing unit (1,000 US gal = 3,785.411784 L) × price
  $\frac{252.288}{3,785.411784} \times $5.00$ $= $0.33$
4. Water wasted per year: 152.7 US gal
1. Water lost per minute = drips × drop volume × faucets
  $11 \times 0.05 mL \times 2$ $= 1.1 mL$
2. Scale up to a full day: multiply by the 1,440 minutes in a day, then turn mL into liters
  $\frac{1.1 mL \times 1,440}{1,000}$ $= 1.584 L$
3. Multiply the daily loss by 365 to see the total over a whole year
  $1.584 L \times 365$ $= 578.16 L$
4. Convert to US gallons (1 US gal = 3.785411784 L)
  $\frac{578.16 L}{3.785411784}$ $= 152.734 US gal$
5. Yearly cost = liters ÷ liters per billing unit (1,000 US gal = 3,785.411784 L) × price
  $\frac{578.16}{3,785.411784} \times $7.00$ $= $1.07$
5. Water wasted per year: 199.9 US gal
1. Water lost per minute = drips × drop volume × faucets
  $12 \times 0.06 mL \times 2$ $= 1.44 mL$
2. Scale up to a full day: multiply by the 1,440 minutes in a day, then turn mL into liters
  $\frac{1.44 mL \times 1,440}{1,000}$ $= 2.0736 L$
3. Multiply the daily loss by 365 to see the total over a whole year
  $2.0736 L \times 365$ $= 756.864 L$
4. Convert to US gallons (1 US gal = 3.785411784 L)
  $\frac{756.864 L}{3.785411784}$ $= 199.942 US gal$
5. Yearly cost = liters ÷ liters per billing unit (1,000 US gal = 3,785.411784 L) × price
  $\frac{756.864}{3,785.411784} \times $5.00$ $= $1.00$
6. Water wasted per year: 91.6 US gal
1. Water lost per minute = drips per minute × drop volume
  $11 \times 0.06 mL$ $= 0.66 mL$
2. Scale up to a full day: multiply by the 1,440 minutes in a day, then turn mL into liters
  $\frac{0.66 mL \times 1,440}{1,000}$ $= 0.9504 L$
3. Multiply the daily loss by 365 to see the total over a whole year
  $0.9504 L \times 365$ $= 346.896 L$
4. Convert to US gallons (1 US gal = 3.785411784 L)
  $\frac{346.896 L}{3.785411784}$ $= 91.64 US gal$
5. Yearly cost = liters ÷ liters per billing unit (1,000 US gal = 3,785.411784 L) × price
  $\frac{346.896}{3,785.411784} \times $6.00$ $= $0.55$
7. Water wasted per year: 48.6 US gal
1. Water lost per minute = drips per minute × drop volume
  $7 \times 0.05 mL$ $= 0.35 mL$
2. Scale up to a full day: multiply by the 1,440 minutes in a day, then turn mL into liters
  $\frac{0.35 mL \times 1,440}{1,000}$ $= 0.504 L$
3. Multiply the daily loss by 365 to see the total over a whole year
  $0.504 L \times 365$ $= 183.96 L$
4. Convert to US gallons (1 US gal = 3.785411784 L)
  $\frac{183.96 L}{3.785411784}$ $= 48.597 US gal$
5. Yearly cost = liters ÷ liters per billing unit (1,000 US gal = 3,785.411784 L) × price
  $\frac{183.96}{3,785.411784} \times $7.00$ $= $0.34$
8. Water wasted per year: 62.5 US gal
1. Water lost per minute = drips per minute × drop volume
  $9 \times 0.05 mL$ $= 0.45 mL$
2. Scale up to a full day: multiply by the 1,440 minutes in a day, then turn mL into liters
  $\frac{0.45 mL \times 1,440}{1,000}$ $= 0.648 L$
3. Multiply the daily loss by 365 to see the total over a whole year
  $0.648 L \times 365$ $= 236.52 L$
4. Convert to US gallons (1 US gal = 3.785411784 L)
  $\frac{236.52 L}{3.785411784}$ $= 62.482 US gal$
5. Yearly cost = liters ÷ liters per billing unit (1,000 US gal = 3,785.411784 L) × price
  $\frac{236.52}{3,785.411784} \times $5.00$ $= $0.31$
9. Water wasted per year: 83.3 US gal
1. Water lost per minute = drips per minute × drop volume
  $12 \times 0.05 mL$ $= 0.6 mL$
2. Scale up to a full day: multiply by the 1,440 minutes in a day, then turn mL into liters
  $\frac{0.6 mL \times 1,440}{1,000}$ $= 0.864 L$
3. Multiply the daily loss by 365 to see the total over a whole year
  $0.864 L \times 365$ $= 315.36 L$
4. Convert to US gallons (1 US gal = 3.785411784 L)
  $\frac{315.36 L}{3.785411784}$ $= 83.309 US gal$
5. Yearly cost = liters ÷ liters per billing unit (1,000 US gal = 3,785.411784 L) × price
  $\frac{315.36}{3,785.411784} \times $6.00$ $= $0.50$
10. Water wasted per year: 62.5 US gal
1. Water lost per minute = drips per minute × drop volume
  $9 \times 0.05 mL$ $= 0.45 mL$
2. Scale up to a full day: multiply by the 1,440 minutes in a day, then turn mL into liters
  $\frac{0.45 mL \times 1,440}{1,000}$ $= 0.648 L$
3. Multiply the daily loss by 365 to see the total over a whole year
  $0.648 L \times 365$ $= 236.52 L$
4. Convert to US gallons (1 US gal = 3.785411784 L)
  $\frac{236.52 L}{3.785411784}$ $= 62.482 US gal$
5. Yearly cost = liters ÷ liters per billing unit (1,000 US gal = 3,785.411784 L) × price
  $\frac{236.52}{3,785.411784} \times $6.00$ $= $0.37$