यदि एक पिंड एक दूरी को x km/hr की चाल से...

यदि एक पिंड एक दूरी को x km/hr की चाल से तय करता है और एक दूसरी तुल्य दूरी को y km/hr की चाल से तय करता है, तो औसत चाल km/hr में क्या है?

A

`(x+y)/2`

B

`sqrt(xy)`

C

`(2xy)/(x+y)`

D

`(x+y)/(xy)`

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