The task is to generate the correct answer for a given math problem.

[Q]: Problem: the speed of a car is 85 km in the first hour and 45 km in the second hour . what is the average speed of the car ?
[A]: 65 kmph


[Q]: Problem: a cat chases a rat 6 hours after the rat runs . cat takes 4 hours to reach the rat . if the average speed of the cat is 90 kmph , what s the average speed of the rat ?
[A]: 36 kmph


[Q]: Problem: a train 200 m long can cross an electric pole in 5 sec and then find the speed of the train ?
[A]:
144