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2015-02-12T15:55:29+05:30

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So let the angle be x

so its complimentary is 90 - x 

so according to question    3\frac{1}{2}x=90-x

⇒  \frac{9}{2}x = 90

⇒ x = 20° ANSWER



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2015-02-12T19:46:05+05:30
Let angle be x

complement=90-x

9/2x=90-x

x=20
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