If radius of the circle is decreased by 50% then the area of thecircleisreducedby
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Step-by-step explanation:
original radius (r)= x
decreased radius (r')= x-x/2 =x/2
original area = πr²
new area = πr'²
reduction =[ (πr² - πr'²)/πr²] ×100
= [x² - (x/2)²]×[100/x²]
= 75%
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