Question

Which of the following statement is correct?
I. A boat can travel 30 km downstream in 6 hours. If it can travel 40km upstream in 10 hours, then speed of stream is 1 km/hr.
II. Length of a train is 1200 metre. If it can cross a 1500 metre long platform in 120 seconds, then speed of train is 90 km/hr.

A Neither I nor II
B Both I and II
C Only I
D Only II
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