Latest SSC Aptitude Question SOLUTION: P is able to do a piece of work in 15 days and Q can do the same work in 20 days. If they can work together for 4 days, what is the fraction of work left? Options 1) 8/15 2) 7/15

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(#M40027374) SSC Numerical Ability question Mental Ability Keep an EYE

P is able to do a piece of work in 15 days and Q can do the same work in 20 days. If they can work together for 4 days, what is the fraction of work left?

Options
1) 8/15
2) 7/15
3) 11/15
4) 2/11

Asked In SSC MAN (11 years ago)

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Read Solution (1) :

Yogesh Bhardwaj  (9 years ago)

Answer is 1.

Let us take the total work to be done is LCM of 15 and 20 = 60
P's 1 day work = 60/15 = 4
Q's 1 day work = 60/20 = 3
p & Q together 1 day's work = 7
since they worked for 4 days. so, P & Q's together 4 days works = 7 x 4 = 28
work left = 60 - 28 = 32
fraction of work left = 32/60 = 8/15

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