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Please answer all the questions

Dear Student, 
Kindly refer to the link for the similar query (question no.1).
https://www.meritnation.com/ask-answer/question/find-the-percentage-increased-in-area-of-triangle-if-its-eac/heron-s-formula/2625270
https://www.meritnation.com/ask-answer/question/if-the-length-of-each-side-of-a-triangle-is-tripled-then-wh/math/2971111
For other questions, we request you to please ask in separate threads.
Regards

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FCX
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Hello Tejas, all at a stretch would be somehow difficult for us. So let me take and solve a few
3) Given median of equilateral is x
So side of triangle will be a = 2 x / ./3
As area of triangle = 1/2 * base * height
Required area = 1/2 * x * 2 x/./3 = x^2 /./3 
Hence option (c) is the apt one
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I DONT KNOW
 
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lol
 
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