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A and B can together finish a work in 30 days. They worked together for 20 days and then B left. After another 20 days A finished the remaining work. In how many days A alone can finish the job?

A50

B60

C48

D54

Answer:

B. 60

Read Explanation:

(A+B)'s one day work=1/30 (A+B)'s 20 days work=20/30=2/3 Remaining work=1-2/3=1/3 Now 1/3 part of work is done by A in 20 days. Whole work will be done by A alone is 20 x 3 = 60 days


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