Cube and Cuboid

Question

When a tank is 1/4 full, it contains 80 litres of water, what will it contain when it's 3/8 full?

Answer 1

1/4 of the tank is 80 liters

we can first find the full tank volume we divide 80 by one fourth which gives us 80: (1/4)= 80x4 (According to fraction division rules)= 320 litters

then we find 3/8 of the full tank which is given by multiplying the 320 by 3/8 = 320x3/8=120liters