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A tank was 1/7 full. When 4 buckets of water were taken out from this tank and 8 buckets of water were poured in it, it was 1/3 full. How much buckets of water can the tank contain?

A tank was 1/7 full. When 4 buckets of water were taken out from this tank and 8 buckets of water were poured in it, it was 1/3 full. How much buckets of water can the tank contain? Correct Answer 21

Given:

Initially, the tank was = 1/7 full

Number of buckets full of water taken out = 4

Number of buckets full of water poured = 8

In the end, the tank was = 1/3 full

Calculation:

Let the tank contain x buckets of water

According to the question

(1/7) - (4/x) + (8/x) = 1/3

⇒ (8/x) - (4/x) = (1/3) - (1/7)

⇒ 4/x =

⇒ 4/x = 4/21

⇒ x = 21

∴ Number of buckets tank can contain is 21.

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