Easy (but kinda tricky/fun) math problem?

Question

My little sister bought this book of fun math problems, and she can't figure out how to solve this one.

"Brooke places orange barrels on both sides of a road that is under construction such that the centers of adjacent barrels on the same side of the road are 15 feet apart. If Brooke does this for a 1.5 mile stretch of roadway, how many barrels will be placed on the two sides of the road in total?"

I can't figure it out because I'm not too good at math, so hopefully someone here can help. Thanks in advance! :)

YouGotOwned · Accepted Answer

Convert miles into feet:

1.5 miles = 7920 feet

7920 feet / 15 = 528

Multiply it by two, because there are barrels on each side of the road:

528 * 2 = 1056

Hope this helped!

? · Answer

First, 1.5 miles = 7920 feet.

Next, 7920 divided by 15 = 528

So there are 528 15-foot distances on each side of the road.

But you have to include the barrel at the beginning of each row: so there are actually 529 barrels on
 
each side, for a total of 1058 barrels.

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Easy (but kinda tricky/fun) math problem?

2 Answers