Question

Raju&tom together can do a work in 10 day. Tom&appu together can do it in 12 days .appu&raju together can do it in 15 days.in how many days will they finish it if all the three work together?

Answer 1

hey there,

i hope this helps u out...

1 day work of raju and tom=1/10

i day work of tom and appu=1/12

1 day work of appu and raju=1/15

let us assume appu as a ,tom as t ,raju as r...

by the condition,

2(t+r+a)=1/10+1/12+1/15

2(t+r+a)=6+5+4/60

2(t+r+a)=15/60

t+r+a=1/4*2

t+r+a=1/8

since the work done by t, r, a together is 1/8,

time taken by them=1/1/8=8days...