Question : Two people A and B started running from the same point on a circular track of length 400 m in opposite directions with initial speeds of 10 m/s and 40 m/s, respectively. Whenever they meet, A's speed doubles and B's speed halves. After what time from the start will they meet for the third time?

Option 1: 30 sec

Option 2: 24 sec

Option 3: 26 sec

Option 4: 28 sec

Question : Two persons A and B are running around a circular track of length 1200 m with respective speeds of 27 kmph and 36 kmph. They started at the same time from the same point and are running in the same direction. When will they meet for the first time on the track (in seconds)?

Option 1: 420

Option 2: 240

Option 3: 480

Option 4: 360

Question : Raju and Sohan started a car race from the same point, in the same direction and at the same circular track of length 1725 m with speeds of 72 km/hr and 90 km/hr, respectively. After how much time (in seconds) will they meet again for the first time?

Option 1: 345 seconds

Option 2: 335 seconds

Option 3: 340 seconds

Option 4: 350 seconds

Question : A train of length 300 metres crosses a tree in 20 seconds and crosses another train of the same length travelling in the opposite direction in 25 seconds. What is the speed of the second train?

Option 1: 10 m/s

Option 2: 12 m/s

Option 3: 15 m/s

Option 4: 9 m/s

Question : Anil and Arun started for car race from the same point in the same direction and at the same time on a circular track of length 2575 m with speeds 72 km/hr and 90 km/hr, respectively. After how much time (in seconds) will they meet again for the first time?

Option 1: 520

Option 2: 525

Option 3: 510

Option 4: 515