If the volume of a cube is 729 cm3, then its surface area is

If the volume of a cube is 729 cm³, then its surface area is
(a) 486 cm²
(b) 324 cm²
(c) 162 cm²
(d) none of these

Solution:

If the lateral surface area of a cube is 100 cm², then its volume is
(a) 25 cm³
(b) 125 cm³
(c) 625 cm³
(d) none of these

Solution:

If the length of side of a cube is doubled, then the ratio of volumes of new cube and original cube is
(a) 1 : 2
(b) 2 : 1
(c) 4 : 1
(d) 8 : 1

Solution:

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