Question

on decreasing the radius of the circle by 30% , it's area is decreased by
(a) 30%
(b) 60%
(c) 45%
(d) none of these.​

Answer 1

$\huge\bold\blue{30\:Percent}$

Answer 2

Step-by-step explanation:

area = 22/7 × 7/10 ×7/10

= 7 ×22/100

= 154/100

= 77/50

= 27×100/50

= 54%

option d