Question

A completes a work in 10 days , B in 12 days and C in 15 days. If A,B and C work alternately , then how many days are required to complete the work...???

Answer 1

@hartnn @UnkleRhaukus

Answer 2

let 'n' be days required to complete the work.
how much work will A complete in one day ?

Answer 3

1 / 10

Answer 4

so, we have then doing work alternately,
in three days they all will work once,
so, each will work for n/3 days, right ?
total work =1
so, could you get now, how i got this equation ?
n/3 (1/10 + 1/12+1/15) =1

Answer 5

A does 1/10 of a job per day.
B does 1/12 of a job, and
c does 1/15 of a job.
Adding those up says that you get .25 of the job done by these guys in 3 days.

You should be able to take it from there... :-)

Answer 6

oh, now you have 2 ways to get same answer :)

Answer 7

:-)

Answer 8

i got it thank you guyz..

Answer 9

welcome ^_^

Answer 10

Glad to help!