bill wants to make a wheel 1 m in circumference what should the radius of the wheel be?

Question

Round answer to the nearest tenth of a centimetre 

Answer 1

the formula for the Circumference of a circle is pi x diameter

the diameter = twice the radius

so, C = pi x d or pi x 2r

 

since we know the circumference, we can write 1m = 3.1415 x 2r

 

so 1m/ (3.1415 x 2) = r

 

0.16m = 16cm = r