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Imelda drives 170 miles in 2 hours and 30 minutes.

Which represents her average speed in miles per hour?

A. 6.8

B. 68

C. 73

D. 85.5

Sagot :

GinnyAnswer
To find Imelda's average speed in miles per hour, we need to use the formula for average speed, which is:

[tex]\[ \text{Average Speed} = \frac{\text{Total Distance}}{\text{Total Time}} \][/tex]

First, we need to convert the total time traveled into hours. Imelda drove for 2 hours and 30 minutes.

Since there are 60 minutes in an hour, we convert 30 minutes to hours as follows:

[tex]\[ 30 \, \text{minutes} = \frac{30}{60} \, \text{hours} = 0.5 \, \text{hours} \][/tex]

So, the total time in hours is:

[tex]\[ 2 \, \text{hours} + 0.5 \, \text{hours} = 2.5 \, \text{hours} \][/tex]

Next, we use the total distance driven, which is 170 miles.

Now we can calculate the average speed:

[tex]\[ \text{Average Speed} = \frac{170 \, \text{miles}}{2.5 \, \text{hours}} \][/tex]

Doing the division:

[tex]\[ \text{Average Speed} = 68 \, \text{miles per hour} \][/tex]

So, Imelda's average speed is:

[tex]\[ B. 68 \][/tex]
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