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प्रश्न
Find the Total Surface Area and the Lateral Surface Area of a cuboid whose dimensions are: length = 20 cm, breadth = 15 cm, height = 8 cm
उत्तर
Here l = 20 cm, b = 15 cm, h = 8 cm
L.S.A of the cuboid = 2(l + b)h sq.m
= 2(20 + 15) × 8
= 2 × 35 × 8
= 560 sq.m2
Total surface area of the cuboid = 2(lb + bh + lh) sq.units
= 2(20 × 15 + 15 × 8 + 8 × 20) sq. cm
= 2(300 + 120 + 160) sq. cm
= 2 × 580 sq. cm
= 1160 sq. cm2
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