There is a circular path around a sports field. Sonia takes 18 minutes to drive one round of the field, while Ravi takes 12 minutes for the same. Suppose they both start at the same point and at the same time, and go in the same direction. After how many minutes will they meet again at the start- ing point?

A rectangular field is 150 m x 60 m. Cyclists Joe and Jim start together cycling at speeds 21m/min and 28 m/min respectively. They cycle along the track around the field at the same moment. After how many minutes do they meet again at the starting point?

A and B are two points 150 km apart on a highway. Two cars start from A and B at the same time. If they move in the same direction they meet in 15 hours. But if they move in the opposite direction, they meet in 1 hour. Find their speeds.

x,y and z start at the same time in the same direction to run around a circular stadium x completes a round in 126 seconds, y in 154 seconds and z in 231 seconds all starting at the same poinl After what time will they meet again at the starting point. How many rounds would have x, y and z completed by this time?

Suppose a car starts from a place A and travels at a speed of 40 km/h towards another place B. At the same instance, another car starts from B and travels towards A at a speed of 30 km/h. If the distance between A and B is 100 km, after how much time will the cars meet?

Two buses start off with a gap of 2 minutes move with the same acceleration. How long after the departure of 1/9 the second is the distance covered by it equal to of the distance covered by the first?