Question

The moon is about 384400 km from the earth and its path around the earth is nearly circular. Find the circumference of the path described by the moon in lunar month.

Answer 1

We have:
The radius of the path described by the moon around the earth = 384400 km
∴ The circumference of the path described by the moon C = $2\mathrm{\pi }r=2\times \left(\frac{22}{7}\times 384400\right)\mathrm{km}=2416228.57\mathrm{km}$.