Question
PSLE
A tank contained 19 litres of water at 11 00. A tap was turned on and water flowed into the tank 11 00 to 16 00. The line graph shows the amount of water in the tank from 11 00 to 16 00. What was the average increase in the volume of water in litres per hour from 11 00 to 16 00? (Give your answer in ℓ.)

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PSLE
A tank contained 19 litres of water at 11 00. A tap was turned on and water flowed into the tank 11 00 to 16 00. The line graph shows the amount of water in the tank from 11 00 to 16 00. What was the average increase in the volume of water in litres per hour from 11 00 to 16 00? (Give your answer in ℓ.)