Question

5. A bank was 4/5 full of oil. When 630 litres are used, it became ¹/3 full. What is the capacity of the tank when full?​

Answer 1

Explanation:

let's say

Full capacity : V

so the volume of oil : (4/5) V

used volume of oil : 630 l

left volume of oil : (1/3) V

so ,. (4/5)V - 630 l = (1/3)V

(4/5)V - (1/3)V = 630l

(7/15)V = 630l

V = (630 × 15) / 7

V = 135l .......