The time taken by the earth to complete one revolution around the sun is ` 3.156 xx 10^(7) s` . The distance between the earth and the sun is ` 1.5 xx 10^(11)` m. Find the speed of revolution of the earth.

Explanation

`v = (2pi r)/T = (2xx 3.142 xx 1.5 xx 10^(11)m) /(3.156 xx 10^(7) s) `
` = 2.987 xx 10^(4) m//s = 29.87 ` km/s
This is the speed of revolution of the earth.