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: the racing magic takes 50 seconds to circle the racing track once . the charging bull makes 40 rounds of the track in an hour . if they left the starting point together , how many minutes will it take for them to meet at the starting point for the second time ? 
Options: a ) 3 , b ) 6 , c ) 9 , d ) 12 , e ) 15
[EX A]: e

[EX Q]: Problem: the radius of a wheel is 22.6 cm . what is the distance covered by the wheel in making 750 resolutions ? 
Options: a ) 754 m , b ) 704 m , c ) 1055.04 m , d ) 1058.04 m , e ) 204 m
[EX A]: c

[EX Q]: Problem: the length of a train and that of a platform are equal . if with a speed of 144 k / hr , the train crosses the platform in one minute , then the length of the train ( in meters ) is ? 
Options: a ) 757 , b ) 758 , c ) 718 , d ) 1200 , e ) 738
[EX A]:
d