Question

Rakul takes 10 days to dig a well and sunil takes 15 days to dig a well .How much time will they take to dig a well if they both work together?

Answer 1

Answer:

LCM of 10 and 15 is 30.

Rahul's efficiency=30/10 = 3

Sunil's efficiency=30/15=2

Time taken by both to dig a well =30/(3+2)

=30/5

=6 days