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Q.

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

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a

120cm2

b

150cm2

c

130cm2

d

100cm2

answer is A.

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Detailed Solution

L.S.A = perimeter of base x height

=(3+4+5)10

=120cm2

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