Detailed Instructions: Given a math problem with context and a question and 5 answer choices, the task is to provide the correct answer choice based on the problem. You must choose one of the given answer choices by letter: a, b, c, d, or e; anything else is invalid.
Q: Problem: when a stone is dropped from a building 200 m high, its speed is proportional to the time elapsed after dropping. the distance traveled is proportional to the square of the time elapsed. after 1 second the speed of the train was 10 m / sec and it was 190 m above the ground. when its speed is 25 m / sec, what would be its distance from the ground ?
Options: a. 140 m, b. 137.5 m, c. 125.75 m, d. 142.5 m, e. 152.5 m
A:
b