Speed of a boat in standing water is 16 kmph and the speed of the stream is 2 kmph. A man rows to a place at a distance of 6840 km and comes back to the starting point. The total time taken by him is: Choose the correct choice from the following choices:
A) 914.2 hours
B) 900 hours
C) 915 hours
D) 868.6 hours
E) 915 hours
Explanation:   Speed downstream = (16 + 2)= 
<gadget id="calculator">(16 + 2)</gadget>
<output>18</output>
18 kmph   Speed upstream= (16 - 2)= 
<gadget id="calculator">(16 - 2)</gadget>
<output>14</output>
14 kmph   Total time taken= 6840/18 + 6840/14 = 380 + 488.6= 
<gadget id="calculator">380 + 488.6</gadget>
<output>868.6</output>
868.6 hours   Answer: Option 868.6 hours
<result>D</result>
Speed of a boat in standing water is 16 kmph and the speed of the stream is 2 kmph. A man rows to a place at a distance of 6840 km and comes back to the starting point. The total time taken by him is: