Question

Ram and Ravi can do a piece of work in 10 and 15 days, respectively. In how many days will the work be completed, if both of them work together?
1. 5 days
2. 10 days
3. 16 days
4. 6 days

Answer 1

Correct Answer - Option 4 : 6 days

Given:

Ram can do a work in 10 days

Ravi can do a work in 15 days

Calculation:

⇒ One day work of Ram = 1/10

⇒ One day work of Ravi = 1/15

⇒ One day work of Ram and Ravi together = (1/10 + 1/15) = (3 + 2)/30 = 5/30 = 1/6

⇒ Both Ram and Ravi can complete the work together in 6 days.

∴ The required result will be 6 days.