Answer:
[tex]R=\dfrac{17}{3}\ \text{miles/hour}[/tex]
Step-by-step explanation:
It is given that,
Distance covered, [tex]d=8\dfrac{1}{2}\ \text{miles}[/tex]
Time taken, [tex]t=1\dfrac{1}{2}\ \text{hours}[/tex]
We need to find the rate in miles per hour. It can be calculated by dividing distance covered and time taken as follows :
[tex]R=\dfrac{8\dfrac{1}{2}\ \text{miles}}{1\dfrac{1}{2}\ \text{hour}}\\\\R=\dfrac{\dfrac{17}{2}}{\dfrac{3}{2}}\\\\R=\dfrac{17}{3}\ \text{miles/hour}[/tex]
Hence, Dev jogs at the rate of [tex]\dfrac{17}{3}\ \text{miles/hour}[/tex].
The speed of Dev to cover 17/2 miles in 3/2 hours is 17/3 miles/hours.
It is given that
Distance covered by Dev = 17/2 miles
Time taken to cover 8.5 miles = 3/2 hours
Speed is defined as the distance covered in unit time.
So, Speed of Dev = Distance/Time
Speed of Dev = (17/2)/(3/2)
Speed of Dev = 17/3 miles/hours.
Therefore, the speed of Dev to cover 17/2 miles in 3/2 hours is 17/3 miles/hours.
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