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Places A and B are 396 km apart. Train X...

Places A and B are 396 km apart. Train X leaves from A for B and train Y leaves from B for A at the same time on the same day on parallel tracks. Both trains meet after `5 1/2` hours. The speed of Y is 10 km/h more than that of X. What is the speed (in km/h) of Y ?
स्थान A और B 396 किमी दूर हैं | ट्रेन X, A से B के लिए तथा ट्रेन Y, B से A के लिए एक ही दिन एक ही समय पर समानांतर पटरियों पर रवाना होती हैं | दोनों ट्रेनें `5 1/2` घंटे के बाद मिलती हैं | Y की चाल X की चाल से 10 किमी/घंटा अधिक है | Y की चाल ( किमी/घंटा में ) कितनी है ?

A

41

B

54

C

31

D

56

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