Question
PSLE
A tank contained 25 litres of water at 15 00. A tap was turned on and water flowed into the tank 15 00 to 20 00. The line graph shows the amount of water in the tank from 15 00 to 20 00. What was the average increase in the volume of water in litres per hour from 15 00 to 20 00? (Give your answer in ℓ.)

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PSLE
A tank contained 25 litres of water at 15 00. A tap was turned on and water flowed into the tank 15 00 to 20 00. The line graph shows the amount of water in the tank from 15 00 to 20 00. What was the average increase in the volume of water in litres per hour from 15 00 to 20 00? (Give your answer in ℓ.)