In How many days can Saurav alone dot it? if

Sourav and Sahil  can together do a piece of work in 15 days. Sahil alone can do it 20 days. In how many days can Sourav alone do it?

  1. 30 days
  2. 40 days
  3. 45 days
  4. 60 days
Monis Rasool Professor Asked on 24th May 2015 in Maths.
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1 Answer(s)

Answer: 60 days
Explanation:-

Sourav and Sahil can together do a piece of work = 15 days
Sourav and Sahil can together do a piece of work in a day = 1/15 day

Sahil alone can do it = 20 days
Sahil alone can do in a day = 1/20

Sourav alone can do it in a day = 1/15 – 1/20 = (4 – 3)/60 = 1/60
Therefore, Sourav alone can do it = 60 days

Anurag Mishra Professor Answered on 24th May 2015.
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