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: the speed of a car is 60 km in the first hour and 30 km in the second hour . what is the average speed of the car ? 
Options: a ) 45 kmph , b ) 65 kmph , c ) 75 kmph , d ) 85 kmph , e ) 90 kmph
a

Problem: what percent of a day is 7 hours ? 
Options: a ) 29.2 % , b ) 12.5 % , c ) 13 % , d ) 11.3 % , e ) none of these
a

Problem: a train 560 m long is running at a speed of 45 km / hr . in what time will it pass a bridge 140 m long ? 
Options: a ) 40 , b ) 56 , c ) 41 , d ) 42 , e ) 34

b