Air leaks into the chamber from the atmosphere at 1013 kpa

Question

A tiny leak in a 1.00 m³ vacuum chamber causes the internal pressure to rise from 1.00 Pa to 10.0 Pa in 3.77 h when the vacuum pump is not operating.

Air leaks into the chamber from the atmosphere at 101.3 kPa, 20.0°C, and the air inside the chamber is maintained at 20.0°C by heat transfer with the walls. Determine the diameter of the leak hole.