Speed of boat in water is 12km/hr. and the speed of the stream is 3km/hr. Find the time taken by the boat to go upstream a distance of 45km.
Pick one:
A) 3	B) 4	C) 5 hrs.	D) 6	E) 2
US =speed of the boat - speed of the stream 12-3= 
<gadget id="calculator">12-3</gadget>
<output>9</output>
9km/hr. Time taken to cover 45km=45/9= 
<gadget id="calculator">45/9</gadget>
<output>5</output>
5hrs. Answer : 5 hrs.
<result>C</result>
Speed of boat in water is 12km/hr. and the speed of the stream is 3km/hr. Find the time taken by the boat to go upstream a distance of 45km.