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?
Let’s work this out in a step by step way to be sure we have the right answer.
54
30 hours is 30 / 5 = 6 times more time.

So the spider would be able to catch 6 * 9 = 54 flies.

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Final answer: 54