The speed of boat in still water 9 kmph and speed of stream is 3 kmph. Find the time taken by boat to cover 12 km upstream.
A2 hours
B3 hours
C4 hours
D5 hours
Answer:
A. 2 hours
Read Explanation:
Speed of stream is: 3kmhr
Speed of boat in still water is: 9kmhr
Speed of boat in downstream = 9 + 3 = 12
Speed of boat in upstream = 9 - 3 = 6
Time taken by boat in upstream: =12/6=2hr