Question

the circumference of a circle exceeds its diameter by 30 cm find the radius of the circle

Answer 1

let diameter be 'x'
therefore radius = x/2
circumference = x+30
2πr = x + 30
2* 22/7* x/2 = x +30
22x/7 =x +30
22x = 7(x+30)
22x = 7x + 210
22x - 7x = 210
15x = 210
x = 210/15
x = 14
therefore radius = 7

Answer 2

ĀNSWĒR ⏬⏬

=> Let diameter of cirlcle be x

=> we know that Radius = diameter/2

so radius = x/2

According to question

=> Circumference of circle = x+30

= 2πr=x+30

= 2×22/7×x/2=30

= >22x/7 =x+30

=> 22x= 7(x+30)

=> 22x= 7x+210

=>22x-7x-210=0

=> 15x= 210

=> x= 210/15

=> x= 14

=> diameter = x
diameter = 14.

=> radius = 14 /2
=> radius = = 7

Therefore radius of the cirlcle is 7

THANKS ✌☺

#HARYANVI THINKER ✔❤