The surface area of a cube is 384 cm2. Its volume is

We know that,Surface area of cube = 6a2384 = 6a2a = a = a = 8 cmTherefore,Volume of cube = a3 = 83= 512 cm3Hence, option A is correct

Q12 of 94 Page 231

The surface area of a cube is 384 cm². Its volume is

We know that,

Surface area of cube = 6a²

384 = 6a²

a =

a = 8 cm

Therefore,

Volume of cube = a³ = 8³

= 512 cm³

Hence, option A is correct

A cuboid having dimensions 16 m x 11 m x 8 m is melted to form a cylinder of radius 4 m. What is the height of the cylinder?

The dimensions of a cuboid are 8m x 6 m x4 m. Its lateral surface area is

The length, breadth and height of a cuboid are in the ratio 3 : 4 : 6 and its volume is 576 cm³. The whole surface area of the cuboid is

Fill in the blanks:

(i) If l, b, h be the length, breadth and height of a cuboid, then its whole surface area = (………… ) sq units.

(ii) If l, b, h be the length, breadth and height of a cuboid, then its lateral surface area = (…………… ) sq units.

(iii) If each side of a cube is a, then its lateral surface area is………..sq units.

(iv) If r is the radius of the base and h be the height of a cylinder, then its volume is (………….. ) cubic units.

(v) If r is the radius of the base and h be the height of a cylinder, then its lateral surface area is (…………. ) sq units.