Use reasoning to lead to the answer of the following question:
There are 3 kids waiting for the swings and twice as many kids waiting for the slide. If each kid waits 2 minutes for the swings and 15 seconds for the slide, how many seconds shorter is the shorter wait?

270
First find the total wait time for the swings in minutes: 3 kids * 2 minutes / kid = 6 minutes.

Then convert that number to seconds: 6 minutes * 60 seconds / minute = 360 seconds.

Then find the total number of kids waiting for the slide: 3 kids * 2 = 6 kids.

Then find the total wait time for the slide: 15 seconds / kid * 6 kids = 90 seconds.

Then subtract the total wait for the slide from the total wait for the swings to find the difference: 360 seconds - 90 seconds = 270 seconds.

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Therefore, the answer is 270