Question

X alone can complete a piece of work in 40 days. He worked for 8 days and left. Y alone completed the remaining work in 16 days. How long would X and Y together take to complete the work ? 

(a) 40/3 days 

(b) 14 days 

(c) 15 days 

(d) 50/3 days

Answer 1

Correct option (a) 40/3 days

Explanation: 

Let total work = 40 units

X’s 1 day work = 1 unit 

X’s 8 days work is 8×1=8 units 

Work left = 40-8=32 

Work 

Y’s one day work = 2 units

X’s one day work = 1 unit

(X+Y) an complete the whole work together in =