Task: Question Answering
Input (English): Problem: mr . shah decided to walk down the escalator of a tube station . he found â that if he walks down 26 steps , he requires 30 seconds to reach the bottom . however , if he steps down 34 stairs he would only require 18 seconds to get to the bottom . if the time is measured from the moment the top step begins â to descend to the time he steps off the last step at the bottom , find out the height of the stair way in steps ? 
Options: a ) 44 , b ) 45 , c ) 46 , d ) 47 , e ) 48
Output (English): c