Question

Ten men can complete work in 9 days. Three days after they started the work, 2 men joined. In how many days will all of them together complete the remaining work?

Plz give the step by step solution

Answer 1

Step-by-step explanation:

let no of days for 8 men and 2 other men be x and y

10×9=8×x=2×y

=>x=45/4,y=45

8 men in 45/4 days=1work

8 men 1 day=4/45

8 men after 3 days =4/15

work left = 11/15

10 men in 1 day =1/9

10 men in 'a' day = 11/15

=>a/9= 11/15

=>a=33/5=6.6 days

They will complete it in 6.6 days