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A large wooden raft is flowing with a river stream.A man on the raft dives into river and swims downthe stream for 15 minutes and then he turns aboutand comes back to the raft. The swimming speedof man is 5 km/h in still water and the river isflowing with speed 4 km/h. The distance moved bythe raft till the man comes back to raft is(2) 2 km(1) 1 km(4) 4 km(3) 3 km |
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Answer» Answer: 1 km Step-by-step explanation: Given, Speed of the stream/raft = 4 km/h and speed of the man in still water = 5 km/h Speed of the man downstream = 5 + 4 = 9 km/h speed of the man upstream = 5 - 4 = 1 km/h in 15 mins the raft moves = 1 km in 15 mins the man moves 5 km in 60 mins then 1.25 kms upstream = 1km/hr so 15 mins 0.25 kms hence the distance MOVED by the raft till man comes back is 1 km |
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