Question

A man can row at 36 km/hr in still water. In a stream which is flowing at 12 km/hr, it takes him 3 hrs to a place and back. How far is the place?

A 42 km Correct Answer Incorrect Answer
B 48 km Correct Answer Incorrect Answer
C 46 km Correct Answer Incorrect Answer
D 44 km Correct Answer Incorrect Answer
E None of these Correct Answer Incorrect Answer

Solution

Let distance= x km, Rate upstream = 36 - 12 = 24 km/hr Rate downstream = 36 + 12 = 48 km/hr. ∴ Time taken upstream= x/24 and Time taken downstream= x/48 ∴ x/24 + x/48 = 3 ⇒ 3x/( 48) = 3 ⇒ x = 48 km.

Practice Next

Relevant for Exams:

×
×