A boat can travel with a speed of 25km/hr in still water. If the speed of the stream is 5km/hr, find the time taken by the boat to go 90km downstream. Choices.
A) 1 hr	B) 2 hrs	C) 3 hrs	D) 4 hrs	E) 5 hrs
Speed downstream = (25 + 5) km/hr = 30 km/hr.   Time taken to travel 90 km downstream = 90/30= 
<gadget id="calculator">90/30</gadget>
<output>3</output>
3 hrs.   Answer : 3 hrs
<result>C</result>
A boat can travel with a speed of 25km/hr in still water. If the speed of the stream is 5km/hr, find the time taken by the boat to go 90km downstream.