Explanation:

To find the average speed of the bus, we need to calculate the total distance travelled by bus and divide it by the total time taken.

In the first hour, the bus travelled at a speed of 35 km/hr, so it covered a distance of 35 km.

In the second hour, the bus travelled at a speed of 60 km/hr, so it covered a distance of 60 km.

In the third hour, the bus travelled at a speed of 40 km/hr, so it covered a distance of 40 km.

Therefore, the total distance travelled by the bus is 35 km + 60 km + 40 km = 135 km.

The total time taken by the bus is 1 hour + 1 hour + 1 hour = 3 hours.

To find the average speed, we divide the total distance by the total time:

Average speed = Total distance / Total time

Average speed = 135 km / 3 hours

Average speed = 45 km/hr

So, the average speed of the bus is 45 km/hr.

PLEASE MARK ME AS THE BRAINLIEST!!!

Verified answer

Answer:

The average speed of the bus = 45km/hr

Explanation:

   Speed of the bus in first hour = 35 km/hr

   Speed of the bus in second hour = 60 km/hr

   Speed of the bus in third hour = 40 km/hr

Average speed = Total distance traveled / Total time taken

Total distance traveled by the bus = 35 km + 60 km + 40 km = 135 km

Total time taken by the bus = 1 hour + 1 hour + 1 hour = 3 hours

Therefore, the average speed of the bus = 135 km / 3 hours = 45 km/hr