Question

If the radius of a circle is decreased by 50%, find the percentage decrease in its area.

Answer 1

Hey sup!

Let assume that the radius is 10cm.

As per the question,

Area=πr^2.

π will be constant in both so let's discard it,as the change in area will solely depend on radius.

Area= r^2=10×10=100.
New area when radius is decreased by 50%=5×5=25.

Difference= 100-25=75.

Difference%= 75/100 × 100 = 75%.

So, when the radius of a circle is decreased by 50% the are will decrease by 75%.

Hope it helps.

Answer 2

hii mate

happy diwali.

I hope it will help u.