Question

A boat takes a total time of three hours to travel downstream from P and Q and upstream back from Q to P. What is is the speed of the boat in still water?
1. The speed of the river current is 1 km per hour.
2. The distance between P and Q is 4 kilometre.

A. 1 alone sufficient while 2 alone not sufficient to answer.
B. 2 alone sufficient while 1 alone not sufficient to answer.
C. Either 1or 2 alone sufficient to answer.
D. Both 1 and 2 are not sufficient to answer.
E. Both 1 and 2 are necessary to answer.

Which one (A, B, C, D, E ) is correct ?

Answer 1

Answer:

three hours or more than that