Question

if some completes 15 levels of a game in three hours how many will he camplete in day'

Answer 1

Answer:

As per given problem statement:

Let us assume 'W' is the work to be done then a perosn can do W/15 work in one day.

As problem statement is not delivering any information about the working capacity of other two persons, it is right to assume others two are also completing work 'W' in 15 days while working independently. Now as all three persons are working together to complete the work, then:

work done by one person in one day: W/15

work done by three persons in one day: (W/15)*3 =W/5

So, days taken to complete the work are W/(W/5)=5 days.