Question

Велосипедист выехал из города со скоростью 12 км\ч ,через 0,6 часа в противоположном направлении из того же города выехал второй велосипедист причем со скоростью в 1.5 раза больше скорости первого. Сколько километров будет между ними через 1,4 часа после выезда вторго велосипедиста.

Answer 1

1)12*1.5=18
2)12*0.6=7.2
3)18*1,4=25,2
4)25,2+7,2=32,4
ответ 32,4 км

Answer 2

Problem Analysis

We are given that a cyclist starts from a city with a speed of 12 km/h. After 0.6 hours, another cyclist starts from the same city in the opposite direction with a speed 1.5 times greater than the first cyclist. We need to find the distance between them after 1.4 hours from the departure of the second cyclist.

Solution

To solve this problem, we can use the formula: distance = speed × time.

Let's break down the problem step by step:

1. Calculate the distance traveled by the first cyclist after 0.6 hours: - Speed of the first cyclist = 12 km/h - Time = 0.6 hours - Distance = Speed × Time

2. Calculate the speed of the second cyclist: - Speed of the second cyclist = 1.5 × Speed of the first cyclist

3. Calculate the distance traveled by the second cyclist after 1.4 hours: - Speed of the second cyclist = calculated speed from step 2 - Time = 1.4 hours - Distance = Speed × Time

4. Calculate the total distance between the two cyclists: - Total distance = Distance traveled by the first cyclist + Distance traveled by the second cyclist

Let's calculate the distances step by step:

1. Distance traveled by the first cyclist after 0.6 hours: - Speed of the first cyclist = 12 km/h - Time = 0.6 hours - Distance = 12 km/h × 0.6 hours = 7.2 km 2. Speed of the second cyclist: - Speed of the first cyclist = 12 km/h - Speed of the second cyclist = 1.5 × 12 km/h = 18 km/h 3. Distance traveled by the second cyclist after 1.4 hours: - Speed of the second cyclist = 18 km/h - Time = 1.4 hours - Distance = 18 km/h × 1.4 hours = 25.2 km 4. Total distance between the two cyclists: - Distance traveled by the first cyclist = 7.2 km - Distance traveled by the second cyclist = 25.2 km - Total distance = 7.2 km + 25.2 km = 32.4 km

Therefore, the distance between the two cyclists after 1.4 hours from the departure of the second cyclist is 32.4 km.

Answer

The distance between the two cyclists after 1.4 hours from the departure of the second cyclist is 32.4 km.