Task: Question Answering
Input (English): Problem: maxwell leaves his home and walks toward brad ' s house . one hour later , brad leaves his home and runs toward maxwell ' s house . if the distance between their homes is 24 kilometers , maxwell ' s walking speed is 4 km / h , and brad ' s running speed is 6 km / h . what is the total time it takes maxwell before he meets up with brad ? 
Options: a ) 3 , b ) 4 , c ) 5 , d ) 6 , e ) 8
Output (English): a