A takes 2 hours more than B to walk d km, but if A doubles his speed, then he can make it in 1 hour less than… · ABC26GN3638
Subject: General Aptitude · Chapter: Time and Distance · Exam: R.R.B. 2005
$A$ takes 2 hours more than $B$ to walk $d$ km, but if $A$ doubles his speed, then he can make it in 1 hour less than $B$. How much time does $B$ require for walking $d \mathrm{km}$ ?