Question

An oil drum is currently 3⁄4 full. After using 45 litres of oil from it, 1⁄4 part of oil
is still left in the drum. What is the full capacity of the drum?

Answer 1

Answer:

90 litre

Step-by-step explanation:

total oil present 3/4

oil remained =1/4

so oil used= 3/4 - 1/4 = 1/2

so 1/2 volume corresponds to 45 litres

hence to fill it completely 45×2=90 litres.

Answer 2

Given info : An oil drum is currently 3/4 full. After using 45 litres of oil from it, 1/4 part of oil

is still left in the drum.

To find : the full capacity of the drum.

solution : let full capacity of the drum is x litres.

currently, drum contains oil = 3x/4 litres.

a/c to question,

After using 45 litres of oil from it, 1/4 part of oil

is still left in the drum.

⇒3x/4 - 45 = x/4

⇒3x/4 - x/4 = 45

⇒2x/4 = 45

⇒x/2 = 45

⇒x = 90 litres.

Therefore the capacity of the drum is 90 litres.

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