2. Find the T.S.A , L.S.A & Volume of
(i) Cuboid of l = 10 cm , b = 5 cm , h = 3 cm
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Answer:-
length of the cuboid (l) = 10 cm
Breath of the cuboid (b) = 5 cm
Height of the cuboid (h) = 3 cm
Lateral surface area = 2h ( l + b)
= 2×3 ( 10 + 5)
= 6 × 15
= 90 cm2
Total surface area = 2 ( lb + bh + lh )
= 2 ( 10×5 + 5×3 + 10×3 )
= 2 ( 50 + 15 + 30 )
= 2 ( 95 )
= 190 cm2
Volume = lbh
=10x5x3 = 150 cm3
(ii) Cube of Edge 3 cm
Edge (a) =3 cm
T.S.A of cube = 6a²
= 6 x 3 x 3
= 54 cm²
L.S.A of cube = 4a²
= 4 x 3 x 3
= 36 cm²
Volume of cube = a³
= 3x3x3
= 27cm³
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