In this task, you need to answer the given multiple-choice question on the physics. Classify your answers into 'a', 'b', 'c', 'd', and 'e'.

[EX Q]: Problem: 9 . on level farmland , two runners leave at the same time from the intersection of two country roads . one runner jogs due north at a constant rate of 8 miles per hour while the second runner jogs due east at a constant rate that is 8 miles per hour faster than the first runner ' s rate . how far apart , to the nearest mile , will they be after 1 / 2 hour ? 
Options: a ) 6 , b ) 7 , c ) 8 , d ) 12 , e ) 9
[EX A]: e

[EX Q]: Problem: a man can row upstream at 15 kmph and downstream at 25 kmph , and then find the speed of the man in still water ? 
Options: a ) 27 , b ) 29 , c ) 30 , d ) 20 , e ) 24
[EX A]: d

[EX Q]: Problem: a housing society has been allotted a square piece of land measuring 2550.25 sq . m . what is the side of the plot ? 
Options: ['a ) 50.25 m', 'b ) 50.5 m', 'c ) 50.65 m', 'd ) 50.85', 'e ) none']
[EX A]:
b