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 radius of a semi circle is 70 cm then its perimeter is ?
Options: a ) 32.8 , b ) 32.4 , c ) 360 , d ) 32.2 , e ) 32.9
[EX A]: c

[EX Q]: Problem: the lcm of two numbers is 2310 and hcf is 83 . if one of the numbers is 210 . then what is the other number ?
Options: a ) 913 , b ) 825 , c ) 330 , d ) 582 , e ) 465
[EX A]: a

[EX Q]: Problem: a works twice as fast as b . if b can complete a work in 12 days independently , the number of days in which a and b can together finish the work in :
Options: a ) 4 days , b ) 6 days , c ) 8 days , d ) 18 days , e ) 28 days
[EX A]:
a