TASK DEFINITION: You are given a math word problem and you are supposed to make use of mathematical concepts like probability, combinatorics, linear equations, sequences/series, or simple operators like addition, subtraction, division, or multiplication to answer the given question. Choose the best option from the 5 given options and report that option.
PROBLEM: Question: A train 125 m long passes a man, running at 10 km/hr in the same direction in which the train is going, in 10 sec. The speed of the train is?

 Option A: 37 km/hr

 Option B: 50 km/hr

 Option C: 36 km/hr

 Option D: 26 km/hr

 Option E: 55 km/hr

SOLUTION: Option E

PROBLEM: Question: A car dealership has 40 cars on the lot, 30% of which are silver. If the dealership receives a new shipment of 80 cars, 40% of which are not silver, what percentage of total number of cars are silver?

 Option A: 35%

 Option B: 37.5%

 Option C: 45%

 Option D: 47.5%

 Option E: 50%

SOLUTION: Option E

PROBLEM: Question: Two trains are running in opposite directions with the same speed. If the length of each train is 144 m and they cross each other in 12 sec, then the speed of each train is?

 Option A: 22

 Option B: 77

 Option C: 36

 Option D: 88

 Option E: 19.2

SOLUTION:
Option E