Question

Four runners John, Henry, Adam & Kane started running simultaneously from a point on a circular track on a ground. John took 200 seconds, Henry took 300 seconds, Adam took 360 seconds and Kane took 450 seconds to complete the one round. After how much time they meet at the starting point for the first time.

• A. 3600 sec
• B. 2400 sec
• C. 4800 sec
• D. 1800 sec

Answer 1

Answer:

D. 1800 sec

LCM of (200, 300, 360, 450) = 10 × 4 × 5 × 3 × 3 = 1800 sec John, Henry, Adam & Kane meet at the starting point after every 1800 seconds.