Question

A and b can do a work in 72 days,b and c can do it in 120 days,a and c can do it in 90 days.When a,b,c work together,how much work is finished by them in 3 days

Answer 1

here your answer..


(A+B)'s 1 day work = 1/72
(B+C)'s 1 day work = 1/120
(A+C)'s 1 day work = 1/90

On adding 2(A+B+C)'s 1 day work = 1/72 + 1/120 + 1/90 = 1/30

(A+B+C)'s 1 day work = 1/( 2 x 30)= 1/60

A,B and C together can complete work in 60 days.

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