Question

A car travels 30 km at the uniform speed of 40 km/h and next 30 km at the speed of 20 km/h. Find its average speed.

Answer 1

Step-by-step explanation:

I hopes this will help you❤️❤️

Answer 2

Answer:

614.7 m/s

Step-by-step explanation:

Average speed= total distance/total time taken

First we will covert 40km/h and 20km/h to m/s

40*1000/60*60         20*1000/60*60

40000/3600              20000/3600

400/36                        200/36                   [zero will be canceled]

100/9                           50/9

92.1 m/s                       5.5 m/s

Now we will change 30km to m

30*1000

= 30000 m

Average Speed= total distance/total time taken

Average Speed= 30000+30000/92.1+5.5

Average Speed=60000/97.6

Average Speed=600000/976

Average Speed= 37500/61

Average Speed= 614.7 m/s