a tank was full of water. after 400 litres were drawn it became 3/8 full. find the capacity of the tank when full solution

Answer 1

c = capacity

If tank became 3 / 8 full this means:

c - 3 / 8 c = 8 / 8 c - 3 / 8 c = 5 / 8 c

was poured

400 liters = 5 / 8 c

Multiply both sides by 8

3200 liters = 5 c

c = 3200 liters / 5

c = 640 liters