How Much Work will me Left?If

A can do piece of work in 25 days and B can do the same work in 30 days. They work together for 5 days, how much of work left?

  1. 15/30
  2. 19/30
  3. 11/30
  4. 12/30
Monis Rasool Professor Asked on 27th June 2015 in Maths.
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1 Answer(s)

Answer: (2) 19/30
Explanation:-

A can do a piece of work = 25 days
A can do work in a day = 1/25

B can do a piece of work = 30 days
B can do work in a day = 1/30

They do work together in 5 days = 5(1/25 + 1/30)
= 5(6 + 5)/150
= 11/30
Remaining work = 1 – 11/30 = 19/30

Hence, the answer is (2) 19/30.

Anurag Mishra Professor Answered on 28th June 2015.
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