Sony and Ranu together can do a piece of work in 20 days Sony alone can finish the work - Maths - Direct and Inverse Proportions

Question

Sony and Ranu together can do a piece 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 she take?

Abhijeet · Accepted Answer

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

Sony and Ranu together can do a piece 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 she take?