Question

A boat takes 3 hour to go from P to Q down
stream and from Q to P upstream. What is the
speed of the boat in still water ? To know the answer of this question the knowledge of which of the statements (a) and (b) is/are sufficient
The speed of the current is 1 km/hr.
) The distance between P and Q is 4 km.
(A) (a) and (b) together are not sufficient
(a) and (b) together are needed
a) alone is sufficient
D(b) alone is sufficient
Either(a) or (b) is sufficient​

Answer 1

Answer:

nice question..very nice question