If the height of a triangular prism is 10 cms. The sides of the base are 3cm, 4cm, 5cm. Then its “Lateral surface area(L.S.A)” is

If the height of a triangular prism is 10 cms. The sides of the base are 3cm, 4cm, 5cm. Then its “Lateral surface area(L.S.A)” is

A
$120 c m^{2}$
B
$150 c m^{2}$
C
$130 c m^{2}$
D
$100 c m^{2}$

Solution:

L.S.A $=$ perimeter of basexheight

$= (3 + 4 + 5) 10$

$= 120 c m^{2}$

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