It takes Rumi 15 minutes to inspect a machine and Sami needs 18 minutes to inspect a machine. They both start inspecting machines separately at 9:00 AM. At certain points of time, both of them will finish inspecting a machine at the same time. When will this occur for the first time?

Question

It takes Rumi 15 minutes to inspect a machine and Sami needs 18 minutes to inspect a machine. They both start inspecting machines separately  at 9:00 AM. At certain points of time, both of them will finish inspecting a machine at the same time. When will this occur for the first time?

Accepted Answer

সঠিক উত্তর: 10:30 AM। ব্যাখ্যা: