A boatman can row 96 km downstream in 8 hr. If the speed of the current is 4 km/hr, then find in what time will be able to cover 8 km upstream?
Choose the correct option:
A) 6 hr  B) 2 hr  C) 4 hr  D) 1 hr  E) None of these
Explanation :   Speed downstream = 96⁄8 = 12 kmph   Speed of current = 4 km/hr   Speed of the boatman in still water = 12-4= 
<gadget id="calculator">12-4</gadget>
<output>8</output>
8 kmph   Speed upstream= 8-4= 
<gadget id="calculator">8-4</gadget>
<output>4</output>
4 kmph   Time taken to cover 8 km upstream= 8⁄4 = 2 hours. Answer : Option 2 hr
<result>B</result>
A boatman can row 96 km downstream in 8 hr. If the speed of the current is 4 km/hr, then find in what time will be able to cover 8 km upstream?