Question

X can do a piece of work in 20 days. He worked at it for 5 days and then Y finished
it in 15 days. In how many days can X and Y together finish the work?
B
15 Days
A
10 Days
D
24 Days
С
18 Days​

Answer 1

So the answer is 10 days

Step-by-step explanation:

As x and y work at same rate

Coz x finished 1/4th work but still y need 15 days for 3/4th work.

So for both one day work=1/20

So when 1 day work are added we get =1/20+1/20=1/10

So total days required when working together is 10