Question

Exercise 11.2
2 men working together take 6 days to finish a piece of work. If one of them takes 15 days
if he works alone, find how long the second man will take to finish it, working alone?​

Answer 1

Answer:

let two men be X and Y

LCM of 6 and 15 is 30

so, total work is 30

X and Y together complete the work in 6 days

X take alone 15 days to complete the work

so, efficiency of X and Y is 5

and efficiency of X is 2

then, efficiency of Y = 5-2= 3

now, time taken by Y to complete the work

= 30/ 3 = 10 days