46. A man rows 6 km/h in still water. If the river is running at 3 km per hour, it takes him 45 minutes
to row to a place and back. How far is the place?
(a) 1.12 km
(b) 1.25 km
(C) 1.6875 km
(d) 2.5 km
Answers
Answered by
2
Answer:
Speed of boat (Upstream) = speed of boat in still water- speed of water = 6-3=3 km/h.
Speed of boat (downstream) = speed of boat in still water+ speed of water = 6+3 =9km/h.
Time = distance /speed
45/60 = d/9 +d/3
3/4 =4d/9
Distance= 27/16.
Speed of boat (Upstream) = speed of boat in still water- speed of water = 6-3=3 km/h.
Speed of boat (downstream) = speed of boat in still water+ speed of water = 6+3 =9km/h.
Time = distance /speed
45/60 = d/9 +d/3
3/4 =4d/9
Distance= 27/16.
Answered by
3
Answer:
Speed of boat (Upstream) = speed of boat in still water- speed of water = 6-3=3 km/h.
Speed of boat (downstream) = speed of boat in still water+ speed of water = 6+3 =9km/h.
Time = distance /speed
45/60 = d/9 +d/3
3/4 =4d/9
Distance= 27/16.
ans is 1.6875
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