AlgebraEasy–MediumWater left in a tank
Algebra practice question
A tank holds 300 litres and is drained at 12 litres per minute. How many litres remain after 15 minutes?
Answer: 120
300 − 12(15) = 120.
Common wrong answers
- If you answered 25
- 25 is the time to empty the tank.
- If you answered 180
- 180 is the amount drained.
- If you answered 480
- 480 adds instead of subtracting.
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