a car traveled 91 miles in 3 1/4 hours. What is the cars average speed in miles per hour?
91 / 3.25 = ______mph
To find the car's average speed in miles per hour, you can use the formula:
Average speed = Total distance / Total time
In this case, the car traveled 91 miles in 3 1/4 hours.
To convert 3 1/4 hours to a mixed fraction, you first convert the fraction part to an improper fraction:
1/4 hour = 1/4 * 60/60 = 15/60 = 0.25 hours
Then, add the whole number part:
3 1/4 hours = 3 + 0.25 = 3.25 hours
Now you can calculate the average speed:
Average speed = 91 miles / 3.25 hours = 28 miles per hour
Therefore, the car's average speed is 28 miles per hour.
To find the average speed of a car in miles per hour, you can divide the total distance traveled by the total time taken. In this case, the car traveled 91 miles in 3 1/4 hours.
To convert the mixed fraction (3 1/4) into an improper fraction, you multiply the whole number (3) by the denominator (4), and add the numerator (1). Then you put the result as the numerator over the denominator.
Thus, 3 1/4 becomes (3 * 4 + 1) / 4 = 13 / 4.
Now, we can divide the distance (91 miles) by the time (13/4 hours) to get the average speed.
91 miles ÷ (13/4) hours
To divide fractions, we multiply the first fraction by the reciprocal of the second fraction.
91 miles ÷ (13/4) hours = 91 miles x (4/13) hours
Now, multiply the numerators (91 * 4) and the denominators (1 * 13):
364 miles / 13 hours
Therefore, the car's average speed is 364 miles in 13 hours.
To simplify the fraction, we can see that 13 is a prime number, and it doesn't divide evenly into 364. Therefore, the fraction is already in its simplest form.
Therefore, the car's average speed is approximately 27.85 miles per hour.