Question 4

# 4/5 part of a tank is filled with oil. After taking out 42 litres of oil the tank is 3/4 part full. What is the capacity (in litres) of the tank?

Solution

Let capacity of tank = $$x$$ litres

According to ques,

=> $$\frac{4x}{5}-42=\frac{3x}{4}$$

=> $$\frac{4x}{5}-\frac{3x}{4}=42$$

=> $$\frac{16x-15x}{20}=42$$

=> $$x=42\times20=840$$

$$\therefore$$ Capacity (in litres) of the tank = 840 litres

=> Ans - (C)