Question

rana can do a piece of work in 10 day. ramu can do in 12 days and ranga do the. same. work. in 15 days in how many days they can finish the work working together.

Answer 1

ramu one day work=1/10
Mohan one day work=1/15
ramu and Mohan together one day work=1/10+1/15=(3+2)/30=5/30=1/6
together can finish the work in 6 days