Inverse variation problems

Solve:

1. y ∝ 1/x. When x = 4, y = 5. Find y when x = 10.
2. t ∝ 1/v². When v = 2, t = 9. Find t when v = 6.
3. The time t to do a job varies inversely as the number of men n. 5 men take 12 hours. How long for 8 men?
4. p ∝ 1/√q. When q = 25, p = 4. Find p when q = 100.

Submit Exercise