Respuesta :
single journey = 0.5*10 = 5 miles
goung back time = 5 / 30 = 1/6 of an hour
average
speed foe whole journey = 10 / (1/2 + 1/6) = 10 * 3 / 2 = 15 mph
goung back time = 5 / 30 = 1/6 of an hour
average
speed foe whole journey = 10 / (1/2 + 1/6) = 10 * 3 / 2 = 15 mph
Answer:
The average speed of Omar for the entire trip from home to the gift store and back is 15 mph.
Step-by-step explanation:
It is given that Omar traveled uphill to the gift store for 30 minutes at just 10 mph.
1 hour = 60 minutes
0.5 hours = 30 minutes
Total distance between home to gift store is
[tex]Distance=0.5\times 10=5[/tex]
The distance between home to gift store is 5 miles.
Time taken by Omar along the same path downhill at a speed of 30 mph is
[tex]\frac{5}{30}=\frac{1}{6}hours[/tex]
Total distance of the entire trip from home to the gift store and back is
[tex]2\times 5=10miles[/tex]
Formula for average speed is
[tex]Speed=\frac{\text{Total distance}}{\text{Total time}}[/tex]
[tex]Speed=\frac{10}{0.5+\frac{1}{6}}[/tex]
[tex]Speed=\frac{10}{\frac{4}{6}}[/tex]
[tex]Speed=15[/tex]
Therefore the average speed of Omar for the entire trip from home to the gift store and back is 15 mph.
