In calm water, what is the boat's speed? I. It takes 2 hours to get downstream from point A to point B. II. The distance between A and B upstream takes 4 hours to travel.
A. I alone sufficient while II alone not sufficient to answer
B. II alone sufficient while I alone not sufficient to answer
C. Either I or II alone sufficient to answer
D. Both I and II are not sufficient to answer
Answer:D
In calm water, what is the boat's speed? I. It takes 2 hours to get downstream from point A to point B. II. The distance between A and B upstream takes 4 hours to travel.
A. I alone sufficient while II alone not sufficient to answer B. II alone sufficient while I alone not sufficient to answer C. Either I or II alone sufficient to answer D. Both I and II are not sufficient to answer
Explanation: Assume AB = x km.I. Downstream speed = x/2 km/hr.II. Upstream speed = x/4 km/hr.In calm water, the boat's speed is equal to (1/2)x/2 + x/4 km/hr.As a result, neither I nor II provide a solution.