Question

A and B together can complete a job in 8 days. Both B an working alone can finish the same job in 12 days. A and B commence work on the job, and work for 4 days, where upon A leaves, B continues for 2 more days, and then he leaves too, C now starts working, and finishes the job. How many days will C require? 

(a) 5 days 

(b) 8 days 

(c) 3 days 

(d) 4 days

Answer 1

Correct option (d) 4 days

Explanation: 

A and B work for 4 days they completed 3×4 = 12 units

Work left= 24-12 = 12 units

B’s 2 days work = 2 × 2 = 4 units

Work left = 12-4 = 8 units

Now C’s complete the work in

8/2 = 4 days