Question
A rectangular tank 42 cm long, 31 cm wide and 20 cm high is 13 filled with water. When some of the water is poured into an empty rectangular glass container until it is completely full, 5 ℓ of water is left in the tank.
  1. How many litres of water was there in the tank at first?
  2. What is the height of the glass container if it is 46 cm long and 20 cm wide?
4 m
(a)

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(b)

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A rectangular tank 42 cm long, 31 cm wide and 20 cm high is 13 filled with water. When some of the water is poured into an empty rectangular glass container until it is completely full, 5 ℓ of water is left in the tank.
  1. How many litres of water was there in the tank at first?
  2. What is the height of the glass container if it is 46 cm long and 20 cm wide?