A boat travels at 11 km/hr along the stream and 5 km/hr against it in an hour. In calm water, the boat's speed (in km/hr) is:
A. 3 km/hr
B. 5 km/hr
C. 8 km/hr
D. 9 km/hr
Answer:C
A boat travels at 11 km/hr along the stream and 5 km/hr against it in an hour. In calm water, the boat's speed (in km/hr) is:
A. 3 km/hr B. 5 km/hr C. 8 km/hr D. 9 km/hr
Explanation: In calm water, 1/2 (11 + 5) kmph equals 8 kmph.