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A train weighing 196 tonnes experiences a frictional resistance of  `5 11/22`  A Train Weighing 196 Tonnes Experiences A Frictional R... 
per tonne. The speed of the train at the top of a down gradient 1 in
78.4 is 36 km/hour. The speed of the train after running 1 km down the
slope, is


Options:
A .  `5sqrt(10)` m/sec
B .  `10sqrt(5)` m/sec
C .  `5sqrt(3)` m/sec
D .  `3sqrt(5)` m/sec
Answer: Option A


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