Question

a take 3 days b take 4 days c take 6 days respectively to complete a work how many days will it take if they do ir together ​tt​

Answer 1

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Answer 2

Answer:

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can do the work in 6 days, so in 1 day he does 1/6 th of work.

B can do the work in 8 days, so in 1 day he does 1/8 th of work.

C takes the time that A and B would take doing the work together,

so in 1 day, C does 1/8+1/6 of work=3+4/24=7/24 of work in 1 day

Then, B and C working together can do 7/24+1/8 of work in 1 day.

=7+3/24

=10/24=5/12 of work in one day.

The days required for the work to be done is always the reciprocal of the work done in one day.

Therefore, the number of days required for B and C to finish the work is 1/(5/12)=12/5 days or 2.4 days or

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