A boat can travel with a speed of 15 km/hr in still water. If the speed of the stream is 6 km/hr, find the time taken by the boat to go 86 km downstream.  Select:
A) 4.1 hr  B) 5.25 hr  C) 8.25 hr  D) 2.25 hr  E) 2.50 hr
speed of boat in still water = 15 km/hr   speed of the stream = 6 km/hr   Speed downstream = (15+6)= 
<gadget id="calculator">(15+6)</gadget>
<output>21</output>
21 km/hr   Time taken to travel 86 km downstream= 86â„16 = 17â„4 = 4.1 hours   4.1 hrnswer is 4.1 hr
<result>A</result>
A boat can travel with a speed of 15 km/hr in still water. If the speed of the stream is 6 km/hr, find the time taken by the boat to go 86 km downstream.