Question

Find the total surface area of the cuboids of length, breadth and height as given below
1) 8m,5m,3.5m​

Answer 1

Answer:

total surface area of cuboid=2 (lb+bh+hl)

2 (8×5+5×3.5+3.5×8)

2 (40+17.5+28 )

2 (68+17.5)

2×85.5=171sqm

Answer 2

Length of cuboid = 8 m

Breadth of cuboid = 5 m

Height of the cuboid = 3.5 m

Surface area = 2 ( lb + bh + lh )

= 2 ( 8 × 5 + 5 × 3.5 + 8 × 3.5 )

= 2 ( 40 + 17.5 + 28 )

= 2 × 85.5

= 171 m².

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