Level:
Project ID:
9000062904
Source Problem:
Accepted:
1
Clonable:
1
Easy:
1
A semicircle is a half of the full circle. An infinite spiral is built from
semicircles with a decreasing radius. The radius of the first semicircle is
\(3\, \mathrm{cm}\). The
radius of each semicircle in the spiral is smaller by one third of the radius of the
previous semicircle. Find the total length of the spiral.
\(9\pi \)
\(9\)
\(\frac{9}
{5}\pi \)
\(\infty \)