Abdual auto travelled with speed 20 Km/hr from home to school and in returned journey the speed was 30 km/hr. due to less traffic. What is average speed of auto during journey.
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average speed is 2vV by v+ V so 2×20×30=1200/50 equal to 24
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Total distance =20+30=50km
Total time =2 hour
s=d/t
s=50/2
s=25km/h
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