Question

The circumference of a circle is about 50 centimeters (cm). Which is closest to the length of its radius? You may use 3.14 for

Α.4 cm
B. 8 cm
C.16 cm
D.32 cm

Answer 1

8 cm

Explanation:

The formula of circumference is c= πd------(1)

where C = circumference, π = 3.14 and d = diameter

as we know that diameter is equal to d= 2r

put the diameter formula in eq(1)

we get c= π2r-------(2)

from eq (2) separate r means radius

hence, r= c/(π2)------(3)

put the values in eq(3)

and radius is equal to 8 cm.