Math, asked by dipurajput188, 1 year ago

A and B can do a piece of work in 72 days. B and C in 120 days and Aand C in 90 days. in what time can A alone do it?​


sonalkumarpathak8405: ask it from A... xd

Answers

Answered by MoirangthemJohnson
1

A alone can do the same work in 42 days.


sonalkumarpathak8405: h0w?
Answered by Meghanath777
3

Answer:

C) 120 days

Explanation:

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

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

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

2(A + B + C)'s 1 day's work =

1/72 + 1/120 + 1/90

(A + B + C)'s 1 day's work =

5+3+4/(360×2) = 12/ (360×2) = 1/60

As 1 day's work = (A + B + C)'s 1 day's work - (B + C)'s 1 day's work

= 1/60 - 1/120 = (2- 1)/120 = 1/120

A alone can finish the work in 120 days.

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