Question

A and B can finish a piece of work in 15 days and C in 20 days and while c and a in 30 days how long will it take to finish the work alone​

Answer 1

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Ans ) ⇨60

A+B’s rate of work /day=1/20

B +C's rate of work /day=1/30

A-C 's rate of work/day=1/20–1/30=(3–2)/60= 1/60

2C-C=1/60

C=1/60

C will finish the work in 60 days

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Answer 2

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Ans ) ⇨60

A+B’s rate of work /day=1/20

B +C's rate of work /day=1/30

A-C 's rate of work/day=1/20–1/30=(3–2)/60= 1/60

2C-C=1/60

C=1/60

C will finish the work in 60 day

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