Find the surface area of a cuboid 10 m long, 5 m broad

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Find the surface area of a cuboid 10 m long, 5 m broad and 3 m high ?

1. 105 sq m
2. 104 sq m
3. 170 sq m
4. 190 sq m

Correct Option: D

Given that, l = 10 m , b = 5 m, h = 3 m
lb = 10 x 5 = 50, bh = 5 x 3 = 15,
lh = 10 x 3 = 30
∴ Surface area of a cuboid
= 2(lb + bh + lh)
= 2(50 + 15 + 30)
= 2 x 95 = 190 sq m