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Trains Boats and Streams Practice Test 3 with solutions
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© examsnet.com
Question : 27
Total: 40
A man can row
8
1
2
km/hour in a still water and the speed of current is
3
1
2
km/hour. It takes him 42 minutes more than an hour to row to a place and come back. How far is the place?
8 km
7.5 km
6 km
12 km
None of these
Validate
Solution:
Rate downstream = 8.5 + 3.5 = 12 km/hour
Rate upstream = 8.5 - 3.5 = 5 km/hour
Let the distance covered = x km
x
12
+
x
5
+
1
=
42
60
x
(
5
+
12
60
)
=
17
10
x = 6 km
Hence, the place is 6 km far.
© examsnet.com
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