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'.

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
d

Problem: a garrison of 1850 men has provisions for 28 days . at the end of 12 days , a reinforcement arrives , and it is now found that the provisions will last only for 10 days more . what is the reinforcement ?
Options: a ) 1850 , b ) 2960 , c ) 3000 , d ) 1110 , e ) 1712
d

Problem: a train running at the speed of 30 km / hr crosses a pole in 9 seconds . find the length of the train ?
Options: a ) 75 , b ) 65 , c ) 25 , d ) 288 , e ) 212
a