Given the task definition and input, reply with output. In this task, you need to answer the given multiple-choice question on the physics. Classify your answers into 'a', 'b', 'c', 'd', and 'e'.

Problem: in a covering a distance of 30 km , abhay takes 2 hours more than sameer . if abhay double his speed , then he would take 1 hour less than sammer . abhay ' s speed is ?
Options: a ) 5 km / hr , b ) 1 km / hr , c ) 6 km / hr , d ) 3 km / hr , e ) 7 km / hr
a