Question

A circular running track is

1/8
mile long. Elena runs on this track, completing each lap in
1/24
of an hour.
What is Elena's running speed, in miles per hour? Type just the number answer..

Answer 1

3 miles per hour

Explanation:

Speed is defined as the distance covered per unit time, which can be expressed mathematically as follows;

Speed = Distance/Time

The given parameters are;

The length of the circular running track = 1/8 mile

The time it takes Elena to complete a lap = 1/24 hour

Therefore, we have;

Elena's running speed = The distance Elena completes/(The time it takes Elena to complete the given distance)

∴ Elena's running speed = The 1/8 mile track/(1/24 hour)

`Elena's \ running \ speed =((1)/(8) \ mile )/((1)/(24) \ hour ) = \left ((1 )/(8) * (24)/(1 ) \right ) \ (mile)/(hour) = (24)/(8) \ (mile)/(hour) =3 \ mile/hour`

Elena's running speed = 3 mile per hour.