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'.

[Q]: Problem: 6 bells commence tolling together and toll at the intervals of 24 , 68 , 1012 seconds resp . in 60 minutes how many times they will toll together . 
Options: a ) 15 , b ) 16 , c ) 30 , d ) 31 , e ) none of these
[A]: d


[Q]: Problem: if the wheel is 14 cm then the number of revolutions to cover a distance of 3520 cm is ? 
Options: a ) 22 , b ) 28 , c ) 17 , d ) 12 , e ) 40
[A]: e


[Q]: Problem: a man rows his boat 75 km downstream and 45 km upstream , taking 5 hours each time . find the speed of the stream ? 
Options: a ) 6 kmph , b ) 5 kmph , c ) 2 kmph , d ) 3 kmph , e ) 1 kmph
[A]:
d