Mensuration Practice Test 6

Question : 16 of 40

Marks: +1, -0

The volume of a cube is numerically equal to the sum of its edges. What is the total surface area in square units?

Solution:

Volume of the cube = 12a

a^3

= 12a

a^2

= 12
a =

√{12}

a =

2√3

Total surface area of the cube =

6a^2

6× 2 √3 × 2√3

= 72

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