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St Nicholas 2025 P6 Maths Prelim — Paper 2 Q13a Solution

Paper 2 · Q13a · 1 mark · Volume of Cube and Cuboid

Question

At first, $\frac{3}{8}$ of a fish tank was filled with water. A tap was turned on for more water to flow into the tank. It was then turned off after 25 minutes. The line graph shows the amount of water in the tank over the 25 minutes. (a) How many litres of water flowed into the tank in one minute?
Answer: 2.4 l

Worked solution

  1. From the graph the water rose from 48 l to 60 l over the first 5 minutes: $\frac{60 - 48}{5} = \frac{12}{5} = 2.4\text{ l per minute}$.

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