Speed of a boat in standing water is 9kmph and speed of the stream is 1.5kmph. A man can rows to a place at a distance of 105km and comes back to the starting point. The total time taken by him is?  Choose the correct choice from the following choices
A) 12hours	B) 24hours	C) 36hours	D) 10hours	E) 15hours
Speed upstream = 7.5kmph   Speed downstream = 10.5kmph   Total time taken = 105/7.5 + 105/10.5= 
<gadget id="calculator">105/7.5 + 105/10.5</gadget>
<output>24</output>
24 hours   Answer is 24hours
<result>B</result>
Speed of a boat in standing water is 9kmph and speed of the stream is 1.5kmph. A man can rows to a place at a distance of 105km and comes back to the starting point. The total time taken by him is?