Surface Area Grade 7 Ms. Towne (unit 12)

What is the SURFACE area of the following figure?

hint: SA= 2 x l x w + 2 x l x h + 2 x h x w

• 50 feet²

• 150 feet²

• 250 feet²

• 100 feet²

• 80

• 320

• 20

• 352

A triangular prism has a right triangle as its base. The legs of the right triangle are 3 and 4 inches respectively, and the height of the prism is 10 inches. What is the volume of the triangular prism in cubic inches?

• 240

• 120

• 60

• 16

A rectangular aquarium has a length of 16 inches and a width of 10 inches. The aquarium is filled to a depth of 8 inches with water. What is the volume of the water in the aquarium, in cubic inches?

• 208

• 160

• 1280

• 736

• 120 cm²

• 96 cm²

• 108 cm²

• 76 cm²

Steven has a box that is a right rectangular prism. It has a height of 2 inches, a width of 3 inches, and a volume of 30 cubic inches. How many inches long is Steven's box?
Hint: 30  $\div$  (3 x 2)

• 3

• 1.8

• 4.5

• 5

If a cube has a surface area of 486 square feet, what is the length of one edge?
hint: 486 $\div$  6= ____ 
_____ x ______ = 81

• 7.9

• 81

• 40.5

• 9

Pace Moving Company uses two sizes of cartons. The larger carton measures 2 feet by 2 feet by 3 feet. The smaller carton has dimensions that are each half the size of the larger carton. How much less is the volume of the smaller carton?

• 12 ft³

• 6 ft³

• 1.5 ft³

• 10.5 ft³

• 704 cm³

• 560 cm³

• 728 cm³

• 896 cm³

Erica wants to decorate a rectangular box by covering all the faces of the box, including the top and bottom, with 1-inch square pieces of paper. If the box has a height of 3 inches, a width of 5 inches, and a length of 7 inches, how many squares of paper will she need? Show your work.

Erica will need ______ squares of paper.

• 1490

• 140

• 142

• 1492