What is the surface area of the rectangular pyramid below?
(image)

a. 386.9 ft2
b. 593.8 ft2
c. 639.4 ft2
d. 1,053.2 ft2

The correct option is B.

Step-by-step explanation:

The area of pyramid is the sum of area of rectangular base and 4 triangular sides. Two triangle have base 18 ft and height 14.1 ft. Other two have base 10 ft and height 16 ft.

The area of rectangle is

Length of the base is 18ft and width is 10ft.

The area of a triangle is

The area of triangle with base 18 ft and height 14.1 ft is

The area of triangle with base 10 ft and height 16 ft is

The total surface area of the rectangular pyramid is

The surface area of the rectangular pyramid is 593.8 ft². Therefore the correct option is B.