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A man divided his journey into three par...

A man divided his journey into three parts of distances of 18 km, 20 km and 27 km. He travelled the distances at the speeds of 6 km/h, 5 km/h and 9 km/h, respectively. What was his average speed during the entire journey?
एक व्यक्ति ने अपनी यात्रा को 18 किमी, 20 किमी तथा 27 किमी की दूरियों में विभाजित किया। उसने इन दूरियों को क्रमशः 6 किमी/घंटा, 5 किमी/घंटा और 9 किमी/घंटा की चाल से तय किया। पूरी यात्रा के दौरान उसकी औसत चाल कितनी रही ?

A

4.5 km/h

B

5.5 km/h

C

6.5 km/h

D

7.5 km/h

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