If the radius of a circle is increased by
50%, the perimeter of the circle will
increase by
(A) 20% (B) 30%
(C) 40% D) 50%
Answers
Answered by
0
Let the radius be r
Circumference = 2pir
New radius = 1.5r
New circumference = 2pi* 1.5r = 3pir
Increase = pir
Increase % = pir / 2pir X 100 = 50% ANSWER
Circumference = 2pir
New radius = 1.5r
New circumference = 2pi* 1.5r = 3pir
Increase = pir
Increase % = pir / 2pir X 100 = 50% ANSWER
Answered by
1
Step-by-step explanation:
50%
p=2πr
p=2π3/2r
=3πr
increase/actual*100
πr/2πr*100
= 1/2*100
=50%
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