An Airtight Box, Having a Lid of Area 80 Cm²

Multiple Choice

An airtight box, having a lid of area 80 cm², is partially evacuated. Atmospheric pressure is 1.01 *10⁵ Pa. A force of 108 lb is required to pull the lid off the box. The pressure in the box was:

A) 2.60 * 10⁴ Pa
B) 6.35 * 10⁴ Pa
C) 7.50 * 10⁴ Pa
D) 1.38 * 10⁵ Pa
E) 1.76 * 10⁵ Pa