Question

1. The volume of a cube is 729 cm3. Find its total surface area.

Answer 1

Answer:

Answer is 486cm²

Step-by-step explanation:

Volume of cube =729cm²

Formula of volume of cube = a³

a³ = 729cm³

a³ = (9cm)³

a=9

Formula of Total surface area = 6a²

= 6×9×9

= 486cm²

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Answer 2

Answer:

here is your answer.

Step-by-step explanation:

volume of a cube is 729 cu. cm

total surface area= ?

lateral surface area of a cube= total surface area of a cube.

volume of cube =(l)^3

729 = (l) ^3

taking cube root to both side.

l = 9 cm.

now total surface area of a cube. = 4 (l) ^ 2

= 4 × 81

= 324 sq. cm

324 sq. cm is a total surface area as well as lateral surface area of a cube.

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