Question

A drum is 3/4full of water.if 10litres are drawn, it requires 40litres to be full to its brim. Find capacity of drum.

Answer 1

Answer:

120 litres

Step-by-step explanation:

$\frac{3}{4} x - 10 + 40 = x \\ \frac{3}{4} x + 30 = x \\ 30 = \frac{1}{4} x \\ x = 30 \times 4 = 120$

Answer 2

Answer:

90 liters

Step-by-step explanation:

Let the total capacity be x.

According to the question,

(3x4)−15=(7x12)

3x−604=(7x12)

3x−60(12)=(7x)×4

36x−720=28x

36x−28x=720

8x=720

x=90