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3 years ago

A student ran the 100-m dash in 15.4 s. What was the student’s speed in miles per hour?

Mathematics

2 answers:

Marina CMI [18]3 years ago

5 0

Answer:

Speed of the student was 14.51 miles per hour.

Step-by-step explanation:

A student ran the dash = 100 m

Since 1 meter = 0.000621 miles

Therefore, 100 meter = 100× 0.000621

= 0.0621 miles

He ran the dash in 15.4 seconds

∵ 3600 seconds = 1 hour

∴1 second = $\frac{1}{3600}$ hour

∴ 15.4 seconds = $\frac{15.4}{3600}$ hour

= 0.00428 hours

Now we know the formula to calculate the speed

Speed = $\frac{\text{Disatance}}{\text{Time}}$

= $\frac{0.0621}{0.00428}$ miles per hour

= 14.51 miles per hour

Speed of the student was 14.51 miles per hour.

vredina [299]3 years ago

4 0

15.4 seconds = 0.00428 hours and 100 meters = 0.062 miles soo the student ran approximately 14.5 mph

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