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Two trains of the same length are runnin...

Two trains of the same length are running on parallel tracks in the same direction at 54 km/h and 42 km/h respectively. The faster train passes the other train in 63 seconds. What is the length (In metres) of each train?
समान लंबाई की दो ट्रेनें समानांतर पटरियों पर एक ही दिशा में क्रमशः 54 किमी/घंटा और 42 किमी/घंटा की चाल से चल रही हैं | तेज़ ट्रेन दूसरी ट्रेन को 63 सेकंड में पीछे छोड़ देती है | प्रत्येक ट्रेन की लंबाई (मीटर में ) ज्ञात करें |

A

a) 90

B

b) 81

C

c) 105

D

d) 210

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