A company puts up a billboard every 4 miles along 432 miles of highway. How many billboards does the company put up?

2 Answers
Mar 6, 2018

108

Explanation:

We know that the company puts up a billboard every 4 miles, so it would put up 2 every 8 miles, 3 every 12 mile, etc.

So, to compute how many billboards along 432 miles, we divide:

432/4=108

Thus, the company puts up 108 billboards

Mar 6, 2018

109 if there is one at the start of the highway as well.

Explanation:

Be careful with questions like this ... it is easy to forget about the first one.

Consider putting up a fence of 8 metres with the poles 1m apart.

You will need 9 poles, not 8

The first pole can be thought of as being at the beginning, like 0
The second pole will be 1m away
The third pole will be 2m away .. etc
The ninth pole will be 8m away.

The first billboard will be put up at the start of the highway.
The second will be 4 miles away
The third will be 8miles away.

There will always be one more than what it appears to be.

1" "larr this is the one at the beginning.
432 div 4 = 108" "larr these are the ones along the highway,

There will be 109 billboards