Question

A can finish a piece of work in 18 days and B can do the same work in 15 days, B worked for 10 days and left the job. In how many days, A alone can finish the remaining work? 

(a) 6 days 

(b) 11/2 days 

(c) 5 days 

(d) 8 days

Answer 1

Correct option (a) 6 days

Explanation: 

B’s one day work = 6 units

B’s 10 days work = 6×10 = 60 units

Work left = 90 – 60 = 30 units

A does = 30/5 = 6 days