Question

If radius of the circle is decreased by 50% then the area of thecircleisreducedby

Answer 1

Answer:

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%