Question

What is the distance the hula hoop rolls in 4 full rotations?

Answer 1

Circumference is 2rπ

so if I know Radius 35

R= C/2π

so

35 = C/2π

35 x 2π = C

219.8 is the circumference

so 4 rotations is 4 x 219.8 = 879.2 cm rounded to nearest cm is 879cm

Answer 2

879.65

Explanation:

Givens

r = 35 cm

pi = 3.14

Formula

Circumference = 2*pi*r

Solve for 1 loop

C = 2*pi * r

C = 2 * 3.14 * 35

C = 219.9 cm for 1 loop

Solve for 4 loops

1 loop gives 219.9 cm distance that will be covered.

4 loops = x

1/4 = 219.9/ x Cross multiply

x = 4 * 219.9 Combine on the right.

x = 879.65 cm