A is twice as efficient as B and together they can finish a work in 18 A alone

A is twice as efficient as B and together they can finish a work in 18 A alone can finish the  work  in

  1. 27 days
  2. 54 days
  3. 36 days
  4. 45 days
Anurag Mishra Professor Asked on 20th April 2016 in Maths.
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1 Answer(s)

Answer: (1) 27 days

Solution:-
A is twice as efficient as B
Then, 2 A = B or A = B/2

They can finish a work in 18 days.

1/A + 1/2A = 1/18
3/2 A = 1/18
2 A = 54
A = 54/2
A = 27

A alone can finish the work = 27 days.

Hence, the correct answer is option (1) 27 days.

Anurag Mishra Professor Answered on 20th April 2016.
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