Find the total surface area of cubes having following sides-(a) 3 cm(b) 5 cm(c) 5.5 cm - Sri Chaitanya Infinity Learn Best Online Courses for NCERT Solutions, CBSE, ICSE, JEE, NEET, Olympiad and Class 6 to 12

A
54 cm2, 170 cm2, 180.5 cm2
B
54 cm2, 150 cm2, 181.5 cm2
C
150 cm2, 158 cm2, 130.5 cm2
D
54 cm2, 150 cm2, 113.5 cm2

Solution:

(a) given length = 3 cm
Surface area of cube = 6a2
= 6(3)2 = 54 cm2
Hence, the total surface area of the cube is 54 cm2.
(b) Given, a = 5 cm
Surface area of cube = 6a2
= 6(5)2 = 150 cm2
Hence, the total surface area of the cube is 150 cm2.
(c) Given a = 5.5 cm
surface area of cube = 6a2
= 6(5.5)2 = 181.5 cm2
Hence, total surface area of cube is 181.5 cm2
Hence option (2) is correct.

Find the total surface area of cubes having following sides-
(a) 3 cm
(b) 5 cm
(c) 5.5 cm

Solution:

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