10 buckets of water fill a tank when the capacity of each bucket is 14 litres. How many buckets will be needed to fill the same tank, if the capacity of each bucket is 7 litres?

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RRB Group D 29 Aug 2022 Shift 2 Official Paper
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  1. 20
  2. 23
  3. 18
  4. 15

Answer (Detailed Solution Below)

Option 1 : 20
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Detailed Solution

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Given:

10 bucket of 14 litres each is used

Formula used:

M1D1 = M2D2

Calculation:

According to the formula,

⇒ M1D1 = M2D2

⇒ 10 x 14 = 7 x D2

⇒ D2 = 20

⇒ Hence, Total 20 bucket of 7 l each required

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