If each side of a square is decreased by 17%, then by what percentage does its area decrease?
Answer & explanation
Correct answer: option 3
17% = \(\frac{17}{100}\)
Side 100 : 83
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Area 10000 : 6889
{ Area = Side × Side }
Decreased percentage = \(\frac{10000 - 6889}{10000 }\) × 100
= \(\frac{3111}{10000 }\) × 100 = 31.11%