Question

A and B together can complete a piece of work in 8 days, B alone can complete that work in 12 days. B alone worked for four days. After that how long will A alone take to complete the work ? 

(a) 15 days 

(b) 18 days 

(c) 16 days 

(d) 20 days

Answer 1

Correct option (c) 16 days

Explanation:

B’s one day work = 2 units/days

A’s one day work = 3 – 2 = 1 unit/day

4 days work of 'B' = 4 × 2 units/day = 8 units

Work left = 24 – 8 = 16 units 

A will complete the remaining work in