Question

It takes a bus driver 30 minutes to pick up students from four spots. The last stop is at the corner of Green Street and Route 70. The most direct route to school is north on Route 70. The speed limit on Route 70 is 35 kph. The bus driver wants to calculate the average velocity from the last stop to school. Can this be done from the information given?

A. Yes, if the speed limit is 35 kph, and the elapsed time is 30 minutes, the average velocity is 17.5 kph north.
B. No, the distance from the last stop to the school and the time is takes to travel that distance are required.
C. Yes, if the average speed is 35 kph, and it takes 30 minutes, the average velocity is 17.5 kph.
D. No, the distance from the first stop to the school and the average speed are required.

Answer 1

B. No, the distance from the last stop to the school and the time is takes to travel that distance are required.
Hope this helps!

Answer 2

B. No, the distance from the last stop to the school and the time is takes to travel that distance are required.

Explanation:

The problem doesn't give enough information to find the average velocity, because it doesn't specifies the total distance the driver has to cover, neither the time.

Also, the problem doesn't offer the initial or final speed of each part of the road, which can be used to find the average.

However, the best option to find the average velocity here is by knowing the total distance and the total time required, because their quotient is the average speed.

Therefore, the right answer is B.