The edge of a cuboid are $4$ cm, $5$ cm, $10$ cm. What will be surface area of a cuboid ?

210

c m^{2}

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200

c m^{2}

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220

c m^{2}

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None of these

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Solution

The correct option is C $220$ $c m^{2}$
$2 (l b + b h + h l)$
$(l = 4 c m, b = 5 c m, h = 10 c m)$
$= 2 (4 \times 5 + 5 \times 10 + 10 \times 4)$
$= 2 (20 + 50 + 40)$
$= 2 (110) = 220$ $c m^{2}$

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