Subject :IMO Class : Class 8

What is the ratio of Milky Way radius to our solar system radius given that, our solar system radius is 5.9 × 10^{12} metres and the Milky Way disk radius is 3.9 × 10^{20} meters? Round off coefficient to the nearest tenth.

A0.66 × 10^{7}

B6.6 × 10^{7}

C6.6 × 10^{8}

D0.61 × 10^{7}