Question
PSLE
A tank was filled with 45 litres of water at 06 00. Water flowed out of the tank from 06 00 to 10 00. The line graph shows the amount of water in the tank from 06 00 to 10 00. What was the average decrease in the volume of water in litres per hour from 06 00 to 10 00? (Give your answer in ℓ.)

1 m

Click button first when a symbol is required. X

PSLE
A tank was filled with 45 litres of water at 06 00. Water flowed out of the tank from 06 00 to 10 00. The line graph shows the amount of water in the tank from 06 00 to 10 00. What was the average decrease in the volume of water in litres per hour from 06 00 to 10 00? (Give your answer in ℓ.)