रवि और राज 200 मीटर की दौड़ दौड़ रहे हैं। रवि इसे 25 सेकंड में पूरा करता है, जबकि राज 30 सेकंड लेता है। रवि, राज को कितनी दूरी से हराएगा?

Rohan walks around a circular field at the rate of 1 round per hour while Shreyas runs around it at the rate of 5 rounds per hour. They start in the same direction from the same point at 8:30 AM. When will they first cross each other?

In covering 90 km, R takes 4 hours more than S. If R triples his speed, then he would take 2 hours less than S. What is R's original speed (in km/h)?