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

67.5km/hr

Step-by-step explanation:

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

Average speed =
`(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 =
`(150km + 120km )/(2.5 + 1.5)` = 67.5km/hr