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Find the Volume and Total Surface Area of a Cube Whose Each Edge is : (I) 8 Cm (Ii) 2 M 40 Cm. - Mathematics

Sum

Find the volume and total surface area of a cube whose each edge is :
(i) 8 cm
(ii) 2 m 40 cm.

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Solution

(i)

Edge of the given cube = 8 cm

Volume of the given cube = (Edge)3 = (8)3 = 8 x 8 x 8 = 512 cm3

Total surface area of a cube = 6(Edge)2 = 6 x (8)2 = 384 cm2

(ii)

Edge of the given cube = 2 m 40 cm = 2.40 m

Volume of a cube = (Edge)3

Volume of the given cube = (2.40)3 = 2.40 x 2.40 x 2.40 = 13.824 m2

Total surface area of the given cube = 6 x 2.4 x 2.4 = 34.56 m2

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APPEARS IN

Selina Concise Mathematics Class 8 ICSE
Chapter 21 Surface Area, Volume and Capacity
Exercise 21 (A) | Q 5 | Page 238
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