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Jennifer travels first 4 hours of her journey at a speed of 80 miles/hr and the remaining distance in 6 hours at a speed of 30 miles/hr. What is her average speed in miles/hr?
Jennifer travels first 4 hours of her journey at a speed of 80 miles/hr and the remaining distance in 6 hours at a speed of 30 miles/hr. What is her average speed in miles/hr?
A). 50 miles / hr
B). 60 miles / hr
C). 75 miles / hr
D). 92 miles / hr
This Question has 2 answers.
$ \text{Average Speed} = \frac{\text{Total Distance}}{\text{Total Time}} $
$ \text{Distance}_1 = 80 \times 4 = 320 $
$ \text{Distance}_2 = 30 \times 6 = 180 $
$ \text{Total Distance} = 320 + 180 = 500 $
$ \text{Total Time} = 4 + 6 = 10 $
$ \text{Average Speed} = \frac{500}{10} = 50 $
$ \text{Distance}_1 = 80 \times 4 = 320 $
$ \text{Distance}_2 = 30 \times 6 = 180 $
$ \text{Total Distance} = 320 + 180 = 500 $
$ \text{Total Time} = 4 + 6 = 10 $
$ \text{Average Speed} = \frac{500}{10} = 50 $
50 miles / hr
NA
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