Question

Note: take r = 22/7
in the above two questions,

(i) Taking r= 3.14, find the circumference of a circle whose radius is
(a) 8 cm
(b) 15 cm
(c)20 cm

(ii) Calculate the radius of a circle whose circumference is 44cm?​

Answer 1

Answer:

(I) circumference of a circle = 2πr

(a) = 2×3.14×8 cm

= 50.24cm

(b) = 2×3.14×15cm

= 94.2cm

(c) = 2×3.14×20 cm

= 125.6cm

(ll) circumference of a circle = 2πr

44cm = 2πr

(44×7)/2×22) = r

r = 7cm