find the total surface area and the lateral surface area of a cuboid whose dimensions are length=20 cm, breadth=15 cm and height= 8 cm
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Answer:
Step-by-step explanation:
total surface area of cuboid = 2 ( lb + bh + hl )
= 2 ( 20 × 15 + 15 × 8 + 8 × 20 )
= 2 ( 300 + 120 + 160 )
= 2 ( 580 )
= 1160 cm
lateral surface area of a cuboid = 2 ( l + b ) × h
= 2 ( 20 + 15 ) × 8
= 2 ( 35 ) × 8
= 70 × 8
= 560 cm
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