Assuming the earth to be a sphere of radius 6370 km, how many square kilometres is area of the land, if three-fourth of the earths surface is covered by water?

Explanation

Radius of sphere=`6370km`

Water on the earth = `3/4xx`total area

Remaining area = `1-3/4`=`1/4`

Now, total area=`1/4xx4pir^2`

=`pir^2`

=`22/7xx6370^2`

=`127527400km^2`

Hence, `127527400km^2` is area of land.