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Question

If the area of an equilateral triangle is 243 sq. m, then its perimeter is

A
96m
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B
126 m
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C
46 m
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D
26 m
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Solution

The correct option is B 126 m

Area of an equilateral triangle a=34a2

Given, area of the equilateral triangle =243m2

34a2=243m2

a2=24×4

a=46m

Perimeter of the triangle =a+a+a=3a=3×46=126m


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