Respuesta :

Answer:

A's average speed is 100. I did this same thing and passed my grade.

Answer:

Step-by-step explanation:

To answer the question we must find the Time of B.

This should be easy considering the fact that we have are given the Distance and the Speed.

[tex]\frac{D}{S}[/tex] = T

[tex]\frac{60}{40}[/tex] = 1.5 hours or 1 hour and 30 minutes

Now, we know both routes that the same amount of time.

Now we know both routes take 1 hour and 30 minutes

Now we divide 90 by 1.5 to get our Speed for A

[tex]\frac{90}{1.5}[/tex] = 60km/hr