Question

A hotel plans to use marble for part of the floor lobby. The marble section of the floor will be in the shape of a triangle with a base of 80 feet and a height of 60 feet. The marble flooring costs $6 per square foot. How much will the marble for the floor cost?

Answer 1

The area of a triangle is half the base times the height:


`A=(b\cdot h)/(2)`

Thus, the area of the marble section is:


`A=(80 \cdot 60)/(2) = 2,400 \text{ square feet}`

If every square foot costs $6, the total cost is:

2,400 · 6 = $14,400

Answer 2

it will cost $14,400 to do the triangle the hotel plans to do.