if circumstance of a circle decreases by 50%, then the area of the circle is decreased by what
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Let the radius be 'x'
Then, Initial circumference = 2πr
Now, Circum. is decreased by 50%, i.e., Changed circumference = πr
.'. Now, the radius = 1/2 x
.'. Now, the area = 1/4 x²
Change in area = x² - 1/4 x² = 3/4 x² = 75%.......
Then, Initial circumference = 2πr
Now, Circum. is decreased by 50%, i.e., Changed circumference = πr
.'. Now, the radius = 1/2 x
.'. Now, the area = 1/4 x²
Change in area = x² - 1/4 x² = 3/4 x² = 75%.......
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