Question
PSLE
A tank contained 24 litres of water at 13 00. A tap was turned on and water flowed into the tank from 13 00 to 17 00. The line graph shows the amount of water in the tank from 13 00 to 17 00. What was the average increase in the volume of water in litres per hour from 13 00 to 17 00? (Give your answer in ℓ.)

(1) 13 00 to 14 00
(2) 14 00 to 15 00
(3) 15 00 to 16 00
(4) 16 00 to 17 00 


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PSLE
A tank contained 24 litres of water at 13 00. A tap was turned on and water flowed into the tank from 13 00 to 17 00. The line graph shows the amount of water in the tank from 13 00 to 17 00. What was the average increase in the volume of water in litres per hour from 13 00 to 17 00? (Give your answer in ℓ.)

(1) 13 00 to 14 00
(2) 14 00 to 15 00
(3) 15 00 to 16 00
(4) 16 00 to 17 00