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ML Aggarwal Solutions Class 8 Mathematics Solutions for Mensuration Exercise 18.4 in Chapter 18 - Mensuration

Question 1 Mensuration Exercise 18.4

The surface area of a cube is 384 cm2. Find

(i) the length of an edge

(ii) the volume of the cube.

Answer:

Given,

Surface area of a cube = 384 cm2

(i) Surface area of cube = 6(side)2

Hence, edge (side) = √(surface area/6)

= √(384/6)

= √64

= 8 cm

(ii) Volume = (Edge)3 = (8)= 8 × 8 × 8 cm3 = 512 cm3

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