A man can row 4.8 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 ?
Select the correct option
A) 1.9	B) 1.7	C) 1.2	D) 1.5	E) 1.6
Speed of boat in still water (b) = 4.8 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 = 1.6 km/hr.   Answer: 1.6
<result>E</result>
A man can row 4.8 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 ?