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Trains Boats and Streams Practice Test 1 with solutions
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© examsnet.com
Question : 3
Total: 40
A boat running downstream covers a distance of 30 kms in 2 hours. While coming back the boat takes 6 hours to cover the same distance. If speed of the current is half that of the boat. Find the speed of that boat in km/hr.
5
10
15
20
Validate
Solution:
👈: Video Solution
Downstream speed =
30
2
= 15 km/hr; Upstream speed =
30
6
= 5 km/hr
Let speed of the boat and speed of the stream be x km/hr and x/2 km/hr respectively, then,
x
+
x
2
= 15
⇒
3
x
2
= 15
∴ x = 10 km/hr
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