Question

Not understanding this concept at all.

Answer 1

c. 21 mph

Explanation:

22 in = (22in) / (12in/ft) = 1.83 ft

For every 1 rev of the tire, the car moves forward 1.83 ft

(995 rev/min)(1.83 ft/rev) = 1824.2 ft/min

Now convert to mph:

1824.2 ft/min x 1mile/5280ft x 60 min/hr = 20.8 mph ≈ 21 mph