Q. 22 B
If length of each
Answer :
The area of an equilateral triangle of side a =
A= 
Here A1 = 
Now, if we double the side it becomes 2a
the new area is
A=
A= 
A = 
⇒ A = 4A1
The increase in percentage of the area of the equilateral triangle
=
=
= 3 × 100
=300
Hence the % increase in area of equilateral triangle is 300%
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