During 5 hours, a spider can catch 9 flies. How many flies would this spider catch in 30 hours if he would keep his efficiency?
How many hours are in 30 hours? ** 30 hours is 30 / 5 = <<30/5=6>>6 times more time.
How many flies would this spider catch in 30 hours? ** So the spider would be able to catch 6 * 9 = <<6*9=54>>54 flies.
#### 54