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 = [tex]\frac{1}{3600}[/tex] hour
∴ 15.4 seconds = [tex]\frac{15.4}{3600}[/tex] hour
= 0.00428 hours
Now we know the formula to calculate the speed
Speed = [tex]\frac{\text{Disatance}}{\text{Time}}[/tex]
= [tex]\frac{0.0621}{0.00428}[/tex] miles per hour
= 14.51 miles per hour
Speed of the student was 14.51 miles per hour.
