Acar is traveling at a speed of 81 miles per hour. what is the car's speed in feet per second? how many feet will the car travel in 15 seconds? in your computations, use the fact that 1 mile is equal to 5280 feet. do not round your answers.

The amount of feet the car would have travelled in 15 seconds is;

1782 ft

Speed of the Car = 81 mph

We are given that;

1 mile = 5280 ft

Thus; 81 miles = 81 × 5280 = 427680 ft

Thus; Speed of car is now 427680 ft/hr

Now, we know that;

3600 seconds = 1 hour

Thus, the speed is;

427680 ft per 3600 seconds.

To find how many ft the car will travel in 15 seconds, we use use proportion to get;

(427680 × 15)/3600 = 1782 ft

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1 mile = 5280 feet

81 * 5280 = 427680 feet per hour

 1 hour = 3600 seconds

427680 / 3600 = 118.8 feet per second

118.8 * 15 = 1782 feet in 15 seconds

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