A car travels 620 miles in 10 hours. What is the speed of the car in miles per hour?

Distance covered= 620 miles
Time taken= 10 hours
Speed =?

Speed = $\frac{\mathrm{Distance} \mathrm{covered}}{\mathrm{Time} \mathrm{taken}}$

Putting the given values in the equation, 

Speed = $\frac{620}{10}$

 $\therefore$ Speed = 62 mph

Therefore, the speed of the car is 62 miles per hour or mph.