Question

Gerry and Alain run around a running track.
To run around the track once
• Gerry always takes 90 seconds
• Alain always takes 105 seconds.
They start together at the same point.
After how many minutes are they next together at that point?

Answer 1

Answer:

630 seconds or $10\frac{1}{2}$ minutes

Step-by-step explanation:

LCM of 90 and 105=630

When Gerry taking 90 seconds and Alain taking105 seconds together at the same point they together meet at the starting point after 630 seconds. Which is $10\frac{1}{2}$ minutes.