Question

1. A cube has edges measuring 9 inches each. Find the surface area of the cube.​

Answer 1

• a = 9 inches
• Surface Area = 6(a)² = 6(9)² = 6(81) = 486 inch²

Answer 2

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GIVEN THAT:

$;&#10152$ edge of cube = 9 inch

FORMULA

$;&#10152$ The surface area of cube = 6(a)^2

where,

a = edge of cube

SOLUTIONS

$;&#10152$ The surface area of cube

$&#10230 \: \: 6{a}^{2} = 6 \times {(9)}^{2} \\ \\ &#10230 \: \: 6 \times 81 \: \: \: \: \: \: \: \: \: \: \: \: \: \: \\ \\ &#10230 \: \: 486 \: {(inch)}^{2} \: \: \: \: \:$

$;&#10152$ Hence the surface area of cube = 486 in2