Question

Barbara is tiling her craft room floor with square tiles. She wants 6/10 of the square tiles to be red. If she uses 18 red, how many square tiles will be used to cover the floor?

Answer 1

18 is 6/10

18/1 = 6/10

Cross multiply

18x10 is 180

180/6 is 30 tiles total

Explanation:

Answer 2

30 square tiles will be used to cover the floor.

Explanation:

To find the number of tiles that will be used to cover the floor, we will have to interpret the statement mathematically and then solve.

Let x be the total number of tiles that will be used to cover the floor.

From the statement above, Barbara uses 6/10 of the square tiles which is 18 red.

so, 6/10 of the square tiles is equal to 18 red

which implies;

`(6)/(10)` of x = 18

`(6)/(10)` × x = 18

`(6x)/(10)` = 18

cross multiply

6 × x = 18 × 10

6x = 180

Divide both-side of the equation by 6

`(6x)/(6)` =
`(180)/(6)`

(At the left-hand side of the equation, the 6 on the numerator will cancel-out the 6 at the denominator leaving us with just x while at the right-hand side of the equation 180 will be divided by 6)

x =
`(180)/(6)`

x = 30

Therefore, the number of square tiles that will be used to cover the floor is 30.