Question:
A rectangular tank contained some water at first. A tap was then turned on to fill the tank completely with water. It was turned off at the end of 90 minutes. The graph below shows the amount of water in the tank at the end of 90 minutes.
(a) In one minute, how many litres of water flowed from the tap?
(b) How many litres of water overflowed from the tank at the end of 90 minutes?
Solution:
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