Question

Tennis ball machine can launch 60 tennis balls in 12 minutes. At this rate, how many tennis balls can it launch in 2 hours?

Answer 1

`(120/12) * 60 = 600`

Explanation:

There are `120` minutes in `2` hours and `10` sets of `12` minutes in `120` minutes. Therefore, `10` sets of `60` balls launched.

`10 xx 60 = "600 tennis balls"`