A person travels by car from one city to another. He drives for 30.0 min at 80.0 km/h, 12.0 min at 105 km/h, and 45.0 min at 40.0 km/h, and he spends 15.0 min eating lunch and buying gas. What is the average speed for the trip?

53.53 km/h

Explanation:

Given that the person drives for 30.0 min at 80.0 km/h, 12.0 min at 105 km/h, and 45.0 min at 40.0 km/h, and he spends 15.0 min eating lunch and buying gas.

So, the total time to complete the journey is

t=30+12+45+15=102 min

hours

As distance=(speed)x(time), so

the distance covered in 30 minutes with a speed of 80 km/h

km.

The distance covered in 12 minutes with a speed of 105 km/h

.

The distance covered in 45 minutes with a speed of 40 km/h

.

So, to the total distance covered is

As the average speed = (Total distance covered)/(Total time taken)

So, the average speed for the whole journey

.

Hence, the average speed for the trip is 53.53 km/h.

i dont know but

explanation:

whoever your teacher is, deserves a raise for using pokemon as an example

the amount of current in the coil