Question

A car moves 20km with a speed of 50km/h and another 30 km with a speed of 40km/h find the average speed

Answer 1

Answer:

Here's your answer

Explanation:

Given that:

1. First velocity of the car = 50 Km/h
2. second velocity = 40 Km/h

=> Average speed = 50+40/2

=> 90/2

=>45 km/h

Note: We don't consider the distance moved by the car here as mathematically we only need average SPEED.

Hope this helps. If you have any clarification regarding the answer then please feel free to ask.

Answer 2

1st Part:

distance = 20km

speed=50km/h. (seed=distance /time)

time=distance/speed

20/50

0.4 hour

2nd Part:

distance=30km

speed=40km/h

time=30/40

0.75 hour

Average Speed = Total distance travelled

Total time taken

Total distance = 20 +30

50km

Total time taken= 0.4 + 0.75

1.15 hours

Average speed = 50

1.15

= 43.47 km/h