Question

Tyler traveled from town F to town G. For the first 2.5 hours, he travelled at a constant speed of 60 km/h. For the next 1.5 hours, he travelled at a constant speed of 80 km/h. What was the average speed for the whole journey?

Answer 1

Answer:

67.5km/hr

Explanation:

The average speed traveled is the total distance divided by the total time taken.

  Average speed  = $\frac{total distance }{total time}$  

   Distance  = speed x time

Time 1  = 2.5hrs

Speed 1  = 60km/h

    Distance 1   = 2.5 x 60  = 150km

Time 2  = 1.5hrs

Speed  2  = 80km/h

   Distance 2  = 1.5 x 80  = 120km

 Average speed  = $\frac{150km + 120km }{2.5 + 1.5}$   = 67.5km/hr