Q. 124.1( 10 Votes )

A point O is take

Answer :

Let each side of be a cm

So, area () = Area () + Area () + Area ()



On taking “a” as common, we get,





= 15a cm2 (i)


As, triangle ABC is an equilateral triangle and we know that:


Area of equilateral triangle = cm2 (ii)


Now, from (i) and (ii) we get:


15a =


15 × 4 =


60 =


a =


a = 20√3 cm


Now, putting the value of a in (i), we get


Area () = 15 × 20√3


= 300√3 cm2


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