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Area between x=g(y) and y Axis

A 2 m wide ve...

Question

A 2 m wide verandah runs all around outside a hall of size 20 m by 8 m . Find the area of the verandah .

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Solution

Area of verandah $=$ area of hall including verandah $-$ area of hall
$= [(20 + 4) \times (8 + 4) - 20 \times 8] m^{2}$
$= (288 - 160) m^{2} = 128 m^{2}$

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