Level 3
The figure shows a tank made up of 3 sections. Cuboid A with a square base of side 4 cm and height 30 cm. Cube B with a side of 12 cm. Cuboid C that is 60 cm by 20 cm by 40 cm. Water from a tap above flows down at a rate of 1.2 litres per minute while water is drained out from the bottom at a rate of 1 litre per minute. How long did it take to fill up the tank to a height of 66 cm from the base? Give the answer in minutes correct to nearest whole number.

Level 3
The figure shows a rectangular tank measuring 55 cm by 22 cm by 24 cm. It was ¹₃ filled with water at first. Dylan turned on a tap and let water flow into the tank at a rate of 1.36ℓ per minute. After 15 minutes, he turned off the tap. How much water had overflowed? (Express the answer in ℓ.)

Level 3
Shemy placed three empty tanks side by side. The smallest tank has a crack at its side and the base area of each tank is 16 cm². After she turned on the tap for 64 minutes, the height of the water in the smallest tank became 6 cm although 0.5 mℓ of water is leaking out of the crack per minute. Find the rate of flow of water from the tap. Give the answer in mℓ/min.

Level 2
The graph shows the temperature of water in a pot from 08 00 to 08 30.

1. For how many minutes was the temperature of the water 50°C and below?
2. During which two 5-minute intervals did the temperature of water decrease at the same rate?
3. What was the change in temperature per minute from 08 25 to 08 30? Give your answer in °C per minute.