A boat can travel with a speed of 13 km/hr in still water. If the speed of the stream is 5 km/hr, find the time taken by the boat to go 70 km downstream.
Choose one:
A) 4.25 hr  B) 3.8 hr  C) 8.25 hr  D) 2.25 hr  E) 2.50 hr
speed of boat in still water = 13 km/hr   speed of the stream = 5 km/hr   Speed downstream = (13+5)= 
<gadget id="calculator">(13+5)</gadget>
<output>18</output>
18 km/hr   Time taken to travel 70 km downstream=70â„18 = 3.8 hours   Answer is 3.8 hr
<result>B</result>
A boat can travel with a speed of 13 km/hr in still water. If the speed of the stream is 5 km/hr, find the time taken by the boat to go 70 km downstream.