Tony completed a 720 km journey with an average speed of 90 km/h for the first 285 km he travelled at an average speed of 95 Km/h what was the average speed for the remaining journey

Explanation:

Given

Total Distance = 720km

Average Speed = 90km/h

Average Speed (285km) = 95km/h

Required

Determine the average speed for the rest of the journey

First we need to determine the time taken to complete the journey using

Make Time the subject of formula

Next, we determine the time taken to complete 285km of the journey using

Make Time the subject of formula

The difference between these calculated times is the time taken to complete the rest of the journey

Also, we need to calculate the distance of the rest of the journey

The average speed can then be calculated;

Hence, the average speed of the rest of the journey is 87km/h

the tires are rotating at 0.434 rpmlinear speed=45 m/sdiameter=0.550 mradius=0.275 mnow v= rωω= v/rω=45/0.275ω=163.6 rad/sω=163.6 rad/s (1rev/2π rad) (60s/1m)ω=1563 rpm