Question

the circumference of a circle is 440 cm find its radius and diameter (take π = to 22 upon 7)

Answer 1

Circumference = 2*pi*r
440 cm = 2*22/7*r
r = 440*7/2*22
r = 70 cm
diameter = 2*r
= 2*70
= 140 cm

Answer 2

circumferance of circle = 440 cm

formula = 2 * pi * radius 

according to the sum,

2 * 22/7 * r = 440

22/7 * r = 440 /2

22/7 * r = 220

r = 220 / 22/7  ( reciprocal because in fractions of division we have to multiply with reciprocal of fraction)

r = 220 * 7/22 

radius = 70 cm

diameter = 2 * radius 

diameter = 2* 70 = 140cm

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THANKS..............

- P.PRIYAMVATHA