how many gallons are needed

Question

a rectangular table that is placed lengthwise against a wall is 8 feet long and 4 feet wide. balloons will be attached 8inches apart along the theee exposed sides, with one ballon at each of the four corners. how many balloons are needed?

Answer 1

Hi Sarah, I hope you mean how many balloons are needed, how many gallons are needed. If you are, the answer is 25 balloons are needed.

Figure it this way:

Cut the 8 foot length into 2 four 4 foot sections. This gives a total of four 4 foot sections.

Each 4 foot section is 48 inches in length.

Let x a point where a balloon is placed and E represent the end of a four foot section, Then in each section there are 5 balloons.

E-----x-----x-----x-----x-----x-----E

We have 4 sections, which would need 4 * 5, or 20 balloons.

We know there is 1 balloon at each of the four corners, and you need to add one more where the 2 four foot sections meet in the divided 8 foot section, for a total of 5 more balloons.

The eight foot section would look like:

E-----x-----x-----x-----x-----x-----E-----x-----x-----x-----x-----E

This gives a total of 25 balloons.

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