Janak can do a piece of work in 45 days. Ravish can do the same work in 40 days. Janak leaves after working together with Ravish one day and ultimately Ravish completes the remaining work in 23 days. For how many days did Janak worked?

Options
- 13 days
- 12 days
- 9 days
- 8 days

CORRECT ANSWER : 9 days

Discussion Board
ANSWER = 9

let us assume work done w = 360(LCM of 45,40)
janak''s work per day = 360/45 = 8units/day
ravish''s work per day = 360/40 = 9units/day
first we will calculate 23days of work by ravish
i.e., ravish''s remaining work = 23*9 = 207units
now, total-ravish''s = 360-207 = 153units
now, work done by both per day = 8+9 = 17units/day
we will calculate starting days (done by both before janak leaves) = 153/17 = 9days

Ashish Joshi 11-1-2022 03:12 AM

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