Respuesta :

wegnerkolmp2741o

Answer:

45 miles/hour

Step-by-step explanation:

We need the speed in miles per hour so we need to changes minutes to hours

20 minutes * 1 hour /60 minutes = 1/3 hour

Speed = distance/ time

           = 15 miles/(1/3 hour)

            =15 *3 miles/hour

            = 45 miles /hour