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If the sides of an equilateral triangle are increased by 20...

This question belongs to Arithmetic Ability Mensuration 2D
Mensuration 2D
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If the sides of an equilateral triangle are increased by 20%, 30% and 50% respectively to form a new triangle the increase in the perimeter of the equilateral triangle is

Answer & Solution
Correct Answer: Option B
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Perimeter of equilateral triangle = 100 + 100 + 100 = 300
Perimeter of New triangle
= 120 + 150 + 130
= 400
% increase $$ = \frac{{100}}{{300}} \times 100 = 33\frac{1}{3}\% $$
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