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

[EX Q]: Problem: a diagonal of a polygon is an segment between two non - adjacent vertices of the polygon . how many diagonals does a regular 20 - sided polygon have ?
[EX A]: 170', 'c ) 1425', 'd ) 2025', 'e ) 2500'

[EX Q]: Problem: a train running at the speed of 70 km / hr crosses a pole in 9 sec . what is the length of the train ?
[EX A]: 175 m

[EX Q]: Problem: the number of sailors on a ship is 85 % more than the number of officers . the ratio of sailors to officers would be
[EX A]:
37 : 20