Question

1)find the approximate diameter of the circle whose radii is 4cm

2) find the approximate diameter of the circle whose circumference is 18 cm.​

Answer 1

Answer:

diameter=8 cm

2πr=18

2*22/7*r=8

44r/7=8

r=56/44

14/11

28/11is your answer mate

Answer 2

Step-by-step explanation:

1) given radii = 4cm

d = 2r = 2*4 =8

2) circumfurence = 2πr

18 = 2* 22/7 * r

18 = 44/7 * r

126 = 44 * r

2.86 = r

d = 2r = 2 * 2.86 = 5.72