SSC CHSL 9 Jan 2017 Shift 1 Paper

Question : 65 of 100

Marks: +1, -0

Madhur works 2 times faster than Sagar. If Sagar can complete a job alone in 18 days, then in how many days can they together finish the job?

5 days
2 days
6 days
4 days

Validate

Solution:

Let total work to be done = 18 units
Sagar's efficiency =

18/18=

1units/day
Madhur works 2 times faster than Sagar, ⇒ Madhur's efficiency = 1× 2 = 2 units/day
Madhur and Sagar 1 day's work = 1 + 2 = 3 units/day
⇒ Time taken by them to finish the work together =

18/3=6

days

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