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A railway engin of mass 50 tons is pulli...

 A railway engin of mass 50 tons is pulling a wagon of mass 40 tons with a force of 4500N. The resistance force acting is 1N per ton. The tension is the coupling between the engine and the wagon is 

A

1600 N

B

2000 N

C

2500 N

D

1500 N

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The correct Answer is:
B
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