By mistake, a quart of oil was dumped into a swimming pool that measures 25.0cm by 30.0cm (assume the oil spread entirely across the surface of the water in the pool) What was the thickness of the resulting oil slick?

By mistake, a quart of oil was dumped into a swimming pool that measures 25.0cm by 30.0cm (assume the oil spread entirely across the surface of the water in the pool) What was the thickness of the resulting oil slick?