Answer
9.7994 ×10^-9 m/s and 35.278 µm/h
Work Step by Step
If we assume hair grows 1 inch per month we can calculate the speed following these steps
1 in/month × 0.0254 m/ 1 in × 1 month/ 30 days × 1 day / 86400 s = 9.7994 ×10^-9 m/s
Then we can convert it to µm/h
(9.7994 ×10^-9 m/s) × 1,000,000 µm/ 1 m × 3600 s/ 1 h = 35.278 µm/h
