Question

A and B can finish a work in 30 days. They
worked for it for 20 days and then B left. The
remaining work was done by A alone in 20 more
days. A alone can finish the work in
(a) 54 days
(b) 60 days
(c) 48 days
(d) 50 days​

Answer 1

:

(b) 60 days

Step by step explanation:

Amount of work done in 1 day = 1/30

Amount of work done in 20 days =20×1/30= 2/3

Remaining work = 1-2/3= 1/3

Given :

A completes 1/3 work in 20 days

Therefore, A can finish the whole work in (20×3)= 60 days.

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