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 the correct option
A) 2 B) 5 C) 6 D) 7 E) 8

Rationale: "let the speed of arun = x kmph and the speed of anil = y kmph distance = 30 km we know that distancespeed = timehence 30 x − 30 y = 2 . . . . . . . . . . . ( equation 1 ) 30 y − 302 x = 1 . . . . . . . . . . . ( equation 2 ) equation 1 + equation 2 ⇒ 30 x − 302 x = 3 ⇒ 302 x = 3 ⇒ 15 x = 3 ⇒ 5 x = 1 ⇒ x = 5 hence arun ' s speed = 5 kmph answer : b"
Answer: B