Question

अकार मूव्स फ्रॉम ए टू बी विद वेलोसिटी ऑफ 60 किलोमीटर पर आर एंड रिटर्न्स मेक टू ए विद वेलोसिटी ऑफ 30 किलोमीटर पर आर व्हाट इस द एवरेज स्पीड ऑफ द कार इन द एंड एडज्वाइनिंग व्हाट इस द एवरेज वेलोसिटी ऑफ द कार​

Answer 1

Answer:

Answer

Correct option is

B

24kmph

The average speed of any moving body is total distance traveled by the body divided by the total time taken to cover that distance.

Let the distance between A to B be x.

Journey from A to B :

Time taken t

1

=

Speed

Distance

=

30

x

h

Journey from B to A :

Time taken t

2

=

Speed

Distance

=

20

x

h

Total distance covered in whole journey S

′

=2x

Total time taken t

′

=t

1

+t

2

Average speed v

avg

=

t

′

S

′

∴ v

avg

=

30

x

+

20

x

2x

=

20+30

2×20×30

=24

Explanation:

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