If the space needle moves at 14.72 feet per second and the wind blows at 35mph the speed is lowered 5mph how many times greater is the original speed to the new speed

Question

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Answer 1

The conversion factor for mph to ft/s is 22/15, so 35mph=35×22/15=154/3 ft/s.

5mph=5×22/15=22/3 ft/sec. So the speed is lowered to 14.72-7.33=7.387 approx.

Therefore the original speed is 14.72/7.387=1.993 times the new speed, or 1.99 rounded to 2 dec places.

The conversion factor was calculated from knowing that there are 5280 ft in a mile and 3600 seconds in an hour. 5280/3600=22/15.