Question

A B and C can do a piece of work together in 15 days B alone can do in 30 days and C alone can do it in 40 days in how much time will A alone can do the work

Answer 1

see pic for solution tag brainliest plzz

Answer 2

Solutions :-

Given :
A, B and C can do a piece of work together in 15 days.
(A + B + C)'s one day work = 1/15

B alone can do it in 30 days
B's one day work = 1/30

C alone can do it in 40 days
C's one day work = 1/40

(B + C)'s one day work = 1/30 + 1/40
= (4 + 3)/120
= 7/120

A's one day work = (A + B + C)'s one day work - ( B + C)'s one day work
= 1/15 - 7/120
= (8 - 7)/120
= 1/120


Hence,
A can do the same work in 120 days.