Question
PSLE
A tank contained 23 litres of water at 07 00. A tap was turned on and water flowed into the tank 07 00 to 12 00. The line graph shows the amount of water in the tank from 07 00 to 12 00. What was the average increase in the volume of water in litres per hour from 07 00 to 12 00? (Give your answer in ℓ.)

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PSLE
A tank contained 23 litres of water at 07 00. A tap was turned on and water flowed into the tank 07 00 to 12 00. The line graph shows the amount of water in the tank from 07 00 to 12 00. What was the average increase in the volume of water in litres per hour from 07 00 to 12 00? (Give your answer in ℓ.)