Question

a car traveled 27.5 miles in 30 minutes how many miles per hour was it travel

Answer 1

After looking at the given problem it can be seen that the time for which the car traveled is given in minutes. It has to be converted to hours first as the speed of the car has to be calculated in miles per hour.
Distance traveled by the car = 27.5 miles
Time required to travel the distance = 30 minutes
                                                         = 30/60 hour
                                                         = 1/2 hours
Now the speed of the car has to be calculated
Speed of the car = Distance traveled/Time taken
                           = 27.5/(1/2) miles/hour
                           = 27.5 * 2 miles/hour
                           = 55 miles/hour
So the car in the question was traveling at 55 miles per hour.

Answer 2

If you would like to know how many miles per hour was the car travelling, you can calculate this using the following steps:

27.5 miles ... 30 minutes
x miles = ? ... 1 hour = 60 minutes

27.5 * 60 = x * 30    /30
x = 27.5 * 60 / 30
x = 55 miles

Result: The car was travelling 55 miles per hour.