Quantitative Aptitude :: Time and Work - Discussion

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Choose the correct option.

A can complete a piece of work in 8 hours, B can complete in 10 hours and C in 12 hours. If A,B, C start the work together but A laves after 2 hours. Find the time taken by B and C to complete the remaining work.

A2 (1/11) hours

B4 (1/11) hours

C2 (6/11) hours

D2 hours

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Aditya
18 Nov, 2019 2:03 AM

A=8 hrs ,B=10 hrs ,C= 12 hrs

Work done by them together in 1hr=1/8+1/10+1/12= 37/120

In 2hrs=37/60. Work left= 23/60

Now A left after 2 hrs so remaining 23/60 will be done by B & C together.

If B & C work together in 1 hour they can do 1/10+1/12=11/60

So 11/60 in 1 hr. So 1 in 60/11 hr.

Therefore 23/60 in 23/60 * 60/11= 23/11hours.

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