Latest self Aptitude Question SOLUTION: A can do 1/3 of the work in 5 days and B can do 2/5 of the work in 10 days. In how many days both A and B together can do the work? (a) 7 1/4 (b) 8 4/5 (c) 9 3/8 (d) 10

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(#M40023027) SELF question time and work Keep an EYE

A can do 1/3 of the work in 5 days and B can do 2/5 of the work in 10 days. In how many days both A and B together can do the work?

(a) 7 1/4
(b) 8 4/5
(c) 9 3/8
(d) 10

HARJINDER SINGH (10 years ago)

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karthik  (10 years ago)

No of jobs
or
fraction Time in Rate in
of job days job/day
A working alone 1/3 5 (1/3)÷5 =(1/3)·(1/5)=1/15
B working alone 2/5 10 (2/5)÷10 = (2/5)/50=1/25
A&B working together 1 x 1/x

1/15+1/25=1/x
solve ans=9 3/8










Multiply through by LCD = 75 and solve. You'll get x = 9 3/8 days.

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