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A high school track athlete sprints 100 yards in 15 seconds. If there are 5280 feet in a mile and 3600 seconds in an hour, determine the runner's speed in miles per hour. Round to the nearest tenth.

Answer :

The runners speed in miles per hour is 13.6 mph .

In the question ,

it is given that

the high school track athlete sprints 100 yards in 15 seconds

we remember that 1 yard = 3 feet

So, 100 yard = 3*100 = 300 feet

in the question it is given that

5280 feet = 1 mile

1 feet = 1/5280 mile

So, 300 feet = 300/5280 mile

and 3600 second = 1hour

1 second = 1/3600 hour

15 seconds = 15/3600 hour

So, the speed of the runner = (300/5280 mile ) / (15/3600 hour )

= (300/5280) * (3600/15)

On simplifying further ,

we get

= 13.636363

≈ 13.6

Therefore , The runners speed in miles per hour is 13.6 mph .

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