Solution
For this case we have the following relationship:
6 math = 15 minutes
15 math = x minutes
Then we can create the following relationship:
[tex]\frac{15}{6}=\frac{x}{15}[/tex]Solving for x we got:
[tex]x=15\cdot\frac{15}{6}=37.5\min [/tex]Then the answer is:
37.5min