Task: Question Answering
Input (English): Problem: speed of a boat in standing water is 8 kmph and the speed of the stream is 2 kmph . a man rows to place at a distance of 210 km and comes back to the starting point . the total time taken by him is : 
Options: a ) 48 hours , b ) 51 hours , c ) 36 hours , d ) 56 hours , e ) none
Output (English): d