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IBPS RRB Officer Scale 1 Model Paper 10

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Question : 67

Total: 80

If time taken to cover (D + 11) km upstream is thrice the time taken to cover (D -3) km down stream.If ratio of speed of boat in upstream to the downstream is 3 : 7 and time taken to cover (D + 18) kmdownstream is 2.5 hours what will be the speed of current?

4 km/hr
6 km/hr
8 km/hr
10 km/hr
None of these

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