A train weighing 196 tonnes experiences a frictional resistance of 5(11/22) per

Question

A train weighing 196 tonnes experiences a frictional resistance of 5(11/22) 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 . 5 √10 m/sec

B . 10 √5 m/sec

C . 5 √3 m/sec

D . 3 √5 m/sec

Answer: Option A

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