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Total Surface Area of a Cuboid

A hall is 2...

Question

A hall is $25$ m long. $8$ m wide and $5$ m high. Its walls and the roof are to be white wash inside. Find the total area to be washed(in $m^{2}$ ).

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Solution

Area to be white washed $= 2 (l + b) \times h + l \times b = 2 (25 + 8) \times 5 + (25 \times 8) = 330 + 200 = 530 m^{2}$

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