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

• ক 112
• খ 1616
• গ 19.75 ✅ সঠিক উত্তর
• ঘ None of these