Question
PSLE
A tank was filled with 46 litres of water at 18 00. Water flowed out of the tank from 18 00 to 23 00. The line graph shows the amount of water in the tank from 18 00 to 23 00. What was the average decrease in the volume of water in litres per hour from 18 00 to 23 00? (Give your answer in ℓ.)

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PSLE
A tank was filled with 46 litres of water at 18 00. Water flowed out of the tank from 18 00 to 23 00. The line graph shows the amount of water in the tank from 18 00 to 23 00. What was the average decrease in the volume of water in litres per hour from 18 00 to 23 00? (Give your answer in ℓ.)