Task: Question Answering
Input (English): Problem: if two projectiles are launched at the same moment from 1386 km apart and travel directly towards each other at 445 km per hour and 545 km per hour respectively , how many minutes will it take for them to meet ? 
Options: a ) 80 , b ) 82 , c ) 84 , d ) 86 , e ) 88
Output (English): c