The task is to generate the correct answer for a given math problem.
--------
Question: Problem: a train covers a distance of 12 km in 10 minutes . if it takes 8 seconds to pass a telegraph post , then the length of the train is

Answer: 160 m


Question: Problem: if the cost price of 50 articles is equal to the selling price of 40 articles , then the gain or loss percent is ?

Answer: 25 %


Question: Problem: points a , b , and , c have xy - coordinates ( 2,0 ) , ( 8,12 ) , and ( 14,0 ) , respectively . points x , y , and z have xy - coordinates ( 6,0 ) , ( 8,4 ) , and ( 10,0 ) , respectively . what fraction w of the area of triangle abc is the area of triangle xyz ?

Answer:
1 / 9