Four people are running around a circular ground from a point on the circumference at 9.00 am. For one round, these four persons take respectively 40, 50, 60 and 30 minutes. At what time will they meet together again?

• ক 6.00 pm
• খ 7.00 pm ✅ সঠিক উত্তর
• গ 5.30 pm
• ঘ 7.40 pm