Question

A can do a piece of work in 20 days which B can do in 12 days. B worked at it for 9 days, A can finish the remaining work in:

(a) 5 days 

(b) 7 days 

(c) 11 days 

(d) 3 days

Answer 1

Correct option (a) 5 days

Explanation:

According to question

9 days work of B is 9×5 units = 45 units Work left 

= 60 – 45 = 15 units

Now, A will finish remaining work in 15/3 = 5 days