Question

X and Y can do a piece of work in 12 hours and 15 hours respectively if they work together how long will they take to complete the work​

Answer 1

Answer:

Step-by-step explanation: check it...

Answer 2

Answer:

correct answer is

x=12 h.

y=15 h.

1/12+1/15

5+4/60

9/60

3/20

6 2/3

6hours and 40 minutes