If the sides of an equilateral triangle are increased by 20%, 30%, and 50% respectively, what is the increase in the perimeter?

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A 25%
B 33.33%
C 75%
D 100%

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Answer: B. 33.33%

Let each side be 10, so the perimeter is 30. New sides are 12, 13 and 15, so the new perimeter is 40. Increase = 10/30 x 100 = 33.33%.

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If the sides of an equilateral triangle are increased by 20%, 30%, and 50% respectively, what is the increase in the perimeter?

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