A man can row 3.3 km/hr in still water. It takes him twice as long to row upstream as to row downstream. What is the rate of the current ?
Choose the correct choice from the following.
A) 1.9
B) 1.7
C) 1.2
D) 1.5
E) 1.1
Speed of boat in still water (b) = 3.3 km/hr. Speed of boat with stream (Down Stream), D = b + u Speed of boat against stream (Up stream), U = b – u It is given upstream time is twice to that of down stream. ⇒ Downstream speed is twice to that of upstream. So b + u = 2(b – u) ⇒ u =b/3 = 1.1 km/hr.   Answer: 1.1
<result>E</result>
A man can row 3.3 km/hr in still water. It takes him twice as long to row upstream as to row downstream. What is the rate of the current ?