Question

Roberto solved 6 math problems in 15 minutes. At that rate, how long will it take him to solve 15 math problems

Answer 1

For this case we have the following relationship:

6 math = 15 minutes

15 math = x minutes

Then we can create the following relationship:

`(15)/(6)=(x)/(15)`

Solving for x we got:

`x=15\cdot(15)/(6)=37.5\min`

Then the answer is:

37.5min