Question

If you are driving at a rate of 55 miles per hour, about how man feet per second are you traveling

Answer 1

There's a pertinent identity: 60 mph = 88 ft/sec.

Thus,

55 mph 88 ft/sec

------------ * -------------- = 80.1 ft/sec

1 60 mph

Answer 2

I believe you are travelling about 81 (80 and 2/3 to be exact) feet per second.