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Question

Calculate the area of the shaded region in the given figure.
244572_6a78a991ff914e6a8c2703c5ddeb74f2.png

A
1074m2
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B
1274m2
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C
1174m2
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D
1004m2
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Solution

The correct option is A 1074m2
For the triangle having the sides 122m, 120m and 22m :
s=122+120+222=132m
Area of triangle =s(sa)(sb)(sc)
=132(132122)(132120)(13222)
=132×10×12×110=1320m2
For the triangle having the sides 22m, 24m and 26m :
s=22+24+262=36m
=36(3622)(3624)(3626)
=36×14×12×10=24105
=24×10.25m2(approx.)=246m2
There, the area of the shaded portion
=(1320246)m2=1074 m2

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