Water leaks from a storage tank at a constant rate of 3.5 litres per minute. The tank starts with 210 litres of water. Work out how much water has leaked ou...
Question 1 Report
Water leaks from a storage tank at a constant rate of 3.5 litres per minute. The tank starts with 210 litres of water.
- Work out how much water has leaked out after 24 minutes. (2)
- Find how many litres of water remain in the tank at this time. (1)
Answer Details
This question uses a constant leak rate to find the volume lost over time, then subtracts it from the starting volume.
(a) The volume leaked is the rate multiplied by the time: \(3.5 \times 24\). [1 mark]
This equals \(84\) litres. [1 mark]
(b) The remaining water is the starting volume minus the amount leaked: \(210 - 84 = 126\) litres. [1 mark]
Rate multiplied by time gives the total change, which is then subtracted from (or added to) the starting amount depending on whether the tank is emptying or filling.
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