Question

What is the speed of stream? I   Sum of time taken by a boat in upstream and downstream is 46 hrs to cover distance 460 km in each.  II  Speed of boat in downstream is 50km/h.  III Boat cover 25 km in 2 hr, while rowing in upstream

The following questions are accompanied by three statements I, II, and
III. You have to determine which statements(s) is/are sufficient/necessary to answer the questions.
A Any two statements are sufficient to answer the question
B Either I and II or II and III are sufficient to answer the question
C Either I and II or I and III are sufficient to answer the question
D Either I and III or II and III are sufficient to answer the question
E None of these
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