How much time they will take, if they work together ?

Ram completes a task in 10 hours and system also completes the same task in 15 hours. How much time they will take, if they work together ?

  1. 6 hrs.
  2. 4 hrs.
  3. 9 hrs.
  4. 8 hrs.
Anurag Mishra Professor Asked on 14th December 2015 in Maths.
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1 Answer(s)

Answer: (1) 6 hrs. 

Explanation:-
Ram completes a task = 10 hours
A system also completes the same task = 15 hours

They will take time work together = 10 x 15/(10 + 15)
= 150/25
= 6 hrs.

Hence, the answer is (1) 6 hrs.

Anurag Mishra Professor Answered on 15th December 2015.
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