Question

Estimate the surface area of a cube with side length 9.9 in

A)100 in2
B)400 in2
C)600 in2
D)1000 in2

Answer 1

The answer would be C) 600 in2.

Answer 2

Option C is correct

600
`in^2`

Explanation:

Surface area of cube(S) is given by:

`S = 6a^2` ....[1]

where, a is the side length of a cube.

As per the statement:

A cube with side length 9.9 in.

⇒a = 9.9 in.

Substitute in [1] we have;

`S = 6 \cdot (9.9)^2 = 6 \cdot 98.01 = 588.01 \approx 600 in^2`

Therefore, the estimate the surface area of a cube is, 600
`in^2`