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Q. 1 C5.0( 3 Votes )

Find the L.S.A, T

Class 9th Tamilnadu Board Math Term-III 4. Mensuration

Answer :

Given:

l = 2m, b = 3m and h = 7m

(a) LSA of cuboid = 2(lh+hb)

= 2(2(7) + 7(3))

= 2(14+21)

= 2(35) = 70m²

⇒ LSA of cuboid = 66m²

(b) TSA of cuboid = 2(lh+hb+lb)

= 2(2(7) + 7(3) + 2(3))

= 2(14+21+6)

⇒ TSA of cuboid = 82m²

(c) Volume of cuboid = l× b× h

= 2× 3× 7

⇒ Volume of cuboid = 42m³

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