If x = 7 inches, what is the surface area of the geometric shape formed by this net?

a. 686 square inches
b. 1,862 square inches
c. 490 square inches
d. 154 square inches

the answer is:  A 686 square inches

Step-by-step explanation:

you have to find the area of the 1 rectangle

Area = lw

A= (21 in) (7 in)

= 147 in square

there are 4 rectangular faces so you will need to multiply by 4 to get a total of 588 square inch.

then take 1 congruent squares= 7 in. x 7 in. = 49 square inch

multiply 49 square inch by 2 to get 98 square inch

Find the total surface area of the rectangular prism, add all 4 rectangular faces to the area of the 2 square faces

588 square in + 98 square in = 686 square inches