Question

sony and ranu together can do a price of work in 20 days . Sony alone can finish the work in 30 days . if ranu would have been doing it alone , how long will it take

Answer 1

10 days ..........or 30 days

Answer 2

 Sony and Ranu's work of 1 day=1/20

Sony's 1 day work=1/30

Ranu's 1 day work=1/20 -1/30=1/60

So Ranu can finish the work in 60 days
sorry to say that mere ko math bnane me bilkul mja nhi aata