Ok... i have no idea how to do this problem.... if anybody can help, that would be very much appreciated

Question

___________________________________________

67.) Oil spreads on water to form a film about 100 nm thick. How many square kilometers of ocean will be covered by the slick formed when one barrel of oil is spilled (1 barrel = 31.5 U.S. gallons)

***Answer has two sigifgs

______________________________________________

Thanks!!!!!!

Answer 1

The volume of the spill (area*thickness) has to equal the volume spilled.

Watch units.

Answer 2

ok thanks!!

I got 1.2 km^2 for the answer.