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1. |
A train weighing 196 tonnes experiences a frictional resistance of 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 |
A. | 5 10 m/sec |
B. | 10 5 m/sec |
C. | 5 3 m/sec |
D. | 3 5 m/sec. |
Answer» B. 10 5 m/sec | |