Question

4. Из двух городов, расстояние между которыми 100 км, одновременно в одном направлении выехали две лодки. Скорость первой 60 кмч, второй – 30 км/ч. Через 3 часа расстояние между ними было 190 км. Какое расстояние между ними было в начале пути? СРОЧНО!!!​

Answer 1

• 60-30=30 км/ч разница в скорости
• 30×3=90км/ч
• 100-90=10 км будет между ними

Answer 2

Problem Analysis

We are given that two boats start simultaneously from two cities, and after 3 hours, the distance between them is 190 km. The speed of the first boat is 60 km/h, and the speed of the second boat is 30 km/h. We need to find the initial distance between the two cities.

Solution

Let's assume that the initial distance between the two cities is x km.

After 3 hours, the first boat has traveled a distance of 60 km/h * 3 h = 180 km. After 3 hours, the second boat has traveled a distance of 30 km/h * 3 h = 90 km.

The total distance between the two boats after 3 hours is 180 km + 90 km = 270 km.

We are given that the distance between the two