Kenny played 10 hours of basketball last week. He ran for twice as long as he played basketball, and he practiced on the trumpet for twice as long as he ran. How many hours did Kenny practice on the trumpet last week?
How many hours did Kenny run for? ** Kenny ran for 10*2=<<10*2=20>>20 hours.
How many hours did Kenny practice on the trumpet last week? ** Kenny practiced the trumpet for 20*2=<<20*2=40>>40 hours.
#### 40