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:  Answers:
A) 5 km/h  B) 8 km/h  C) 10 km/h  D) 15 km/h  E) 25 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: