Algebra practice question

Answer: 8

Remaining volume: 60 − 4.5t = 24 → 4.5t = 36 → t = 8.

Common wrong answers

If you answered 36

36 is the number of litres drained, not the time.

If you answered 13.33

13.33 is the time to empty the tank completely (60 ÷ 4.5), not to reach 24 litres.

If you answered 5.33

5.33 is 24 ÷ 4.5, the time to drain 24 litres rather than to leave 24 litres.

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