Question

Wilma is tiling her bathroom with tiles that measure 1 foot along each side. The bathroom is 15 feet long and 10 feet wide. She can lay 30 tiles per hour. Which of the following can be used to find the total number of hours it will take Wilma to cover the floor with tiles?

a) 15 × 30 ÷ 10 = 45 hours
b) 10 × 30 ÷ 15 = 20 hours
c) 15 + 10 ÷ 30 = 0.5 hour
d) 15 × 10 ÷ 30 = 5 hours

Answer 1

To find the total number of hours it will take Wilma to cover the floor with tiles, calculate the area of the bathroom and divide it by the number of tiles she can lay per hour. The correct option is d) 15 x 10 ÷ 30 = 5 hours.

Step-by-step explanation:

To find the total number of hours it will take Wilma to cover the floor with tiles, we need to calculate the area of the bathroom and divide it by the number of tiles she can lay per hour.

The area of the bathroom is the length multiplied by the width, which is 15 feet x 10 feet = 150 square feet.

Since each tile covers 1 square foot, Wilma will need 150 tiles to cover the entire floor.

Since she can lay 30 tiles per hour, it will take her 150 tiles / 30 tiles per hour = 5 hours to cover the floor with tiles.

Therefore, the correct option is d) 15 x 10 ÷ 30 = 5 hours.