Question

kim roof was leaking and the hardware store said a new roof sealant product would fix the roof. Each can of roof sealant covers 100 square feet. the roof was 23 feet long and 15 feet wide.How many cans of roof sealant is needed to buy?

Answer 1

To cover the entire roof, you would need 4 cans of roof sealant.

Step-by-step explanation:

To find out how many cans of roof sealant are needed, we need to calculate the area of the roof first. The area of a rectangle can be found by multiplying its length by its width. In this case, the length of the roof is 23 feet and the width is 15 feet, so the area would be 23 * 15 = 345 square feet.

Now that we know the area of the roof is 345 square feet, we can divide it by the coverage of each can of roof sealant, which is 100 square feet. This gives us 345 / 100 = 3.45 cans.

Since we can't buy a fraction of a can, we need to round up to the nearest whole number. So, you would need to buy 4 cans of roof sealant to cover the entire roof.

Answer 2

First we need to find the area of roof we need to cover:
Length * Width = Area
23 * 15 = 345
Now we know that we must cover 345 square feet of roof.
Then, we must divide the area of roof by the area each can will cover:
345 / 100 = 3.45
Since it would likely be impossible to buy 45% of a can, we must round up since at the same time we can't leave part of the roof uncovered.
3.45 rounded up is 4.

So, you need 4 cans of sealant.