A mole of 1 gallon cans of paint could cover every square inch of the surface of how many planets the size of the earth?

1 answer

figuring 40 square meters per gallon

area= 40m^2/gal*6.02E23gallons

number planets= area/areaofEarth
= area/(4PI*Re^2) where Radius Earth Re=6.37E6meters

I get about 5E10 planets.