Question

Radius of the Earth is 6400 km and that of Mars is 4300000 m. Whose radius is bigger and by how much?

Answer 1

Given, radius of the Earth = 6400 km

= 6400000 m  ...[1 km = 1000 m]

And radius of Mars = 4300000 m

On comparing both the radii, we get

Radius of Earth > Radius of Mars

Difference between the two radii = 6400000 – 4300000 = 2100000 m

Hence, the radius of Earth is bigger and by 2100000 m.