Question
PSLE
A tank contained 14 litres of water at 09 00. A tap was turned on and water flowed into the tank 09 00 to 14 00. The line graph shows the amount of water in the tank from 09 00 to 14 00. What was the average increase in the volume of water in litres per hour from 09 00 to 14 00? (Give your answer in ℓ.)

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PSLE
A tank contained 14 litres of water at 09 00. A tap was turned on and water flowed into the tank 09 00 to 14 00. The line graph shows the amount of water in the tank from 09 00 to 14 00. What was the average increase in the volume of water in litres per hour from 09 00 to 14 00? (Give your answer in ℓ.)