Two boats, traveling at 5 and 10 kms per hour, head directly towards each other. They begin at a distance of 20 kms from each other. How far apart are they (in kms) one minute before they collide?

• ক 1/6
• খ 1/4 ✅ সঠিক উত্তর
• গ 1/2
• ঘ 1/12