A person travels from A to B with a spee...

A person travels from A to B with a speed of 30 km /h. He returns from B to A at with speed of 20 km / h. What is his average speed in the entire journey?
एक व्यक्ति A से B तक 30 km/h की गति से जाता है | वह B से A तक 20 km/h की गति से वापस लौट आता है| पूरी यात्रा में उसकी औसत गति कितनी है ?

26.5 km/h

24 km/h

25 km/h

27.5 km/h

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