In covering a distance of 30 km, A takes 2 hours more than B. If A doubles his speed, then he would take 1 hour less than B. A's speed is:
Choose the correct choice from the following answers:	A) 5 km/h	B) 8 km/h	C) 10 km/h	D) 15 km/h	E) 20 km/h
Let A's speed be X km/hr.   Then, 30/x - 30/2x = 3   6x = 30   x = 5 km/hr.   5 km/hnswer : 5 km/h
<result>A</result>
In covering a distance of 30 km, A takes 2 hours more than B. If A doubles his speed, then he would take 1 hour less than B. A's speed is: