In covering a distance of 30 km, Arun takes 2 hours more than Anil. If Arun doubles his speed, then he would take 1 hour less than Anil. What is Arun's speed?
Select: A) 2 B) 5 C) 6 D) 7 E) 8
Let the speed of Arun = x kmph   and the speed of Anil = y kmph   distance = 30 km   We know that distancespeed=timeHence30x−30y=2...........(Equation1)30y−302x=1...........(Equation2)Equation1 + Equation2⇒30x−302x=3⇒302x=3⇒15x=3⇒5x=1⇒x=5Hence Arun's speed = 5 kmph   Answer : 5
<result>B</result>
In covering a distance of 30 km, Arun takes 2 hours more than Anil. If Arun doubles his speed, then he would take 1 hour less than Anil. What is Arun's speed?