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: calculate the circumference of a circular field whose radius is 8 centimeters . 
Options: a ) 17 π cm , b ) 18 π cm , c ) 1 π cm , d ) 16 π cm , e ) 6 π cm
[EX A]: d

[EX Q]: Problem: a trader sells 45 meters of cloth for rs . 4500 at the profit of rs . 12 per metre of cloth . what is the cost price of one metre of cloth ? 
Options: a ) rs . 80 , b ) rs . 85 , c ) rs . 88 , d ) rs . 100 , e ) none of these
[EX A]: c

[EX Q]: Problem: a train 240 m long , running with a speed of 108 km / hr will pass a tree in ? 
Options: a ) 8 sec , b ) 16 sec , c ) 18 sec , d ) 14 sec , e ) 12 sec
[EX A]:
a