30 किलोमीटर 50 किलोमीटर किलोमीटर 10 किलोमीटर फर्स्ट टू आवर सेकंड ईयर थर्ड फोर्स वन हावर फोर्थ वन हावर फाइंड थे एवरेज स्पीड ऑफ कार
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Explanation:
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 kmph
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