Answers

The Brainliest Answer!
2016-01-23T14:21:41+05:30
Let initial radius = r unit.
∴ Initial circumferance = 2πr unit.
∴Initial area = πr² sq unit.
Now, final circumference = 2πr - 50% of 2πr = πr unit.
let final radius be 'a' unit.
∴ 2πa = πr.
⇒a = r/2.
∴ Final area = πa² = πr²/4 sq unit.
∴ Reduction in area= (πr²-πr²/4)/πr²*100 = 75%.(Ans.)
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