Question

The diameter (d) of a circle with a circumference of 440 cm is: Use Π = 22/7

A) d = 70 cm
B) d = 80 cm
C) d 140 cm
D) d = 160 cm​

Answer 1

C

Explanation:

Circumference Formula :

Circumference = 2πr = πd

Solving :

⇒ 440 = 22/7 × d

⇒ d = 440/22 × 7

⇒ d = 20 × 7

⇒ d = 140 cm

Answer 2

c

Explanation:

c=2*22/7r

440=44/7r

440*7/44=r

70=r

d=2r

d=2*70

d=140 cm