Question

a drum of kerosene is 3/4 full. When 80 litres of kerosene is drawn from it, it remains 7/2 full. Find capacity of the drum.​

Answer 1

Answer:

Let the total capacity be x.

According to the question,

x=90

Step-by-step explanation:

(3x4)−15=(7x12)

3x−604=(7x12)

3x−60(12)=(7x)×4

36x−720=28x

36x−28x=720

8x=720

x=90

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Answer 2

Step-by-step explanation:

3x/4-7x/12=30. (9x-7x)/12=30

2x/12=30x=30×12/15

x=180 litre