Then A alone can complete the whole work in :

In two days A, B and C together can finish ½ of a work and in another 2 days B and C together can finish 3/10 part of the work. Then A alone can complete the whole work in

  1. 15 days
  2. 12 days
  3. 14 days
  4. 10 days
Anurag Mishra Professor Asked on 27th December 2015 in Maths.
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1 Answer(s)

Answer:  (4) 10 days

Explanation:-
A, B and C together can finish 1/2 of a work = 2 days
Therefore, A, B and C together can finish a work = 2 x 2
 = 4 days

B and C together can finish 3/10 part of the work = 2 days
Therefore, B and C can finish 3/10 part of the work = 10 x 2/3
 = 20 /3 days

So, A  alone can complete the whole work = 20/(5 – 3)
= 20 /2 
 = 10 days

Hence, the correct answer is option (4) 10 days. 

Anurag Mishra Professor Answered on 27th December 2015.
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