Question
The figure shows a tank made up of 3 sections. Cuboid G with a square base of side 4 cm and height 28 cm. Cube H with a side of 13 cm. Cuboid J that is 60 cm by 10 cm by 46 cm. Water from a tap above flows down at a rate of 3.8 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 68 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 G with a square base of side 4 cm and height 28 cm. Cube H with a side of 13 cm. Cuboid J that is 60 cm by 10 cm by 46 cm. Water from a tap above flows down at a rate of 3.8 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 68 cm from the base? Give the answer in minutes correct to nearest whole number.