सफल होने के लिए रोज कितने घंटे पढ़ना चाहिए । how many hours per day should be studied । #shorts

How many hours you should study everyday?

Working 8 hours a day, Ashu can a book in 18 days. How many hours a day should he work so as to finish the work in 12 days?

Working 10 hours a day, Aman can complete a piece of work in 18 days. How many hours a day should he work so as to finish the work in 15 days ?