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Q.

If the perimeter of base of a cube is 14 cm and its height is 3.5 cm, then its lateral surface area is

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a

49

$c m 2$

b

56

$c m 2$

c

36

$c m 2$

d

42

$c m 2$

answer is C.

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Detailed Solution

Perimeter of base of cube

$p = 14 c m$

$h e i g h t h = 3.5 c m$

L.S.A. (1)

$= p × h$

$= 14 × 3.5$

$= 49 c m 2$

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