Solve the following: $\newline$ a. Mr. Doers is going to remove all of the ceramic tiles in his kitchen in order to replace them with new ones. There are $18$ tiles along the width of the kitchen and $21$ tiles along the length. How many tiles will he have to remove? $\newline$ b. The kitchen floor is $168$ square feet. New ceramic tiles will cost $\$ 7.50$ per square foot. How much will it cost to replace the kitchen floor?

Full solution

Q. Solve the following:

\newline

a. Mr. Doers is going to remove all of the ceramic tiles in his kitchen in order to replace them with new ones. There are

18

tiles along the width of the kitchen and

21

tiles along the length. How many tiles will he have to remove?

\newline

b. The kitchen floor is

168

square feet. New ceramic tiles will cost

\$ 7.50

per square foot. How much will it cost to replace the kitchen floor?

Calculate total tiles: To find out how many tiles Mr. Doers will have to remove, we need to calculate the total number of tiles in the kitchen. This can be done by multiplying the number of tiles along the width by the number of tiles along the length. $\newline$ Calculation: $18$ tiles (width) $\times$ $21$ tiles (length) $=$ $378$ tiles.
Calculate cost for replacement: Now, we need to calculate the cost to replace the kitchen floor. We know the kitchen floor is $168$ square feet and the cost of new ceramic tiles is $\$7.50$ per square foot. $\newline$ Calculation: $168$ square feet * $\$7.50$ per square foot = $\$1260$ .