Question

Ram and Shyam working together can complete a work in 12 days. Shyam alone can finish it in 30 days. In how many days will Ram alone complete the work?​

Answer 1

Ram and Shyam can complete the work in 12 days

So in one day they can complete 1/12 of the work

Shyam alone can complete it in 30 days

So in one day he can complete 1/30

So in one day Ram can complete 1/12 - 1/30 of the work

= 1/20 of the work

Hence, Ram can complete the work in 20 days

Hope this helps...