Question
The figure shows a tank made up of 3 sections. Cuboid H with a square base of side 9 cm and height 34 cm. Cube J with a side of 16 cm. Cuboid K that is 74 cm by 18 cm by 41 cm. Water from a tap above flows down at a rate of 3.1 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.
3 m

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The figure shows a tank made up of 3 sections. Cuboid H with a square base of side 9 cm and height 34 cm. Cube J with a side of 16 cm. Cuboid K that is 74 cm by 18 cm by 41 cm. Water from a tap above flows down at a rate of 3.1 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.