instruction:
The task is to generate the correct answer for a given math problem.
question:
Problem: john left home and drove at the rate of 45 mph for 2 hours . he stopped for lunch then drove for another 3 hours at the rate of 45 mph to reach his destination . how many miles did john drive ?
answer:
225 miles .


question:
Problem: a train running at the speed of 70 km / hr crosses a pole in 9 sec . what is the length of the train ?
answer:
175 m


question:
Problem: a can give b 50 meters start and c 200 meters start in a kilometer race . how much start can b give c in a kilometer race ?
answer:

157.89