Practice questions available in **McGraw Hill Math Grade 6 Answer Key PDF** **Lesson 23.6 Surface Area **will engage students and is a great way of informal assessment.

## McGraw-Hill Math Grade 6 Answer Key Lesson 23.6 Surface Area

**Exercises**

**FIND THE SURFACE AREA**

Question 1.

Answer:

l = 9

b = 2

h = 3

SA = 2(lw + lh + hw)

SA = 2(9 × 2 + 9 × 3 + 3 × 2)

SA = 2(18 + 27 + 6)

SA = 2(51)

SA = 102

Question 2.

Laura wants to cover a box in fabric for an art project. If the box is a square with 4-inch sides, how much fabric will she need to completely cover all the sides?

Answer:

s = 4 inch

A = 6s²

A = 6 × 4 × 4

A = 96 sq. inch

Question 3.

What is the surface area of the pyramid above if the base is a square with sides of 5 and each triangular side has an area of 10π?

Answer:

Given,

base = 5

height = 10π

A = a² + 2a√ a²/4 + h²

A = 25 + 10√ 25/4 + 985.96

A = 25 + 10(5/2) + 985.96

A = 1035.96 sq. units