Question

Из двух городов ,между котрыми 621км,выехали на встречу друг другу две машины.Первая машина выехала раньше на 2 ч и двигалась со скоростью 75 км/ч.Через 3 ч после выхода второй машины они встретились . Найдите скорость второй машины.

Answer 1

2+3=5(ч)
75*5=375(км)-первая машина
621-375=264(км в час)-вторая машина

Answer 2

2 + 3 = 5 ч - проехала первая машина до сближения
75 * 5 = 375 км - проехала первая машина до сближения
621 - 375 = 246 км - проехала вторая машина до сближения
246 / 3 = 82 км/час - скорость второй машины

Answer 3

Problem Analysis

We have two cars that are traveling towards each other from two different cities. The first car started 2 hours earlier and is moving at a speed of 75 km/h. The second car started 3 hours later and they meet after 3 hours. We need to find the speed of the second car.

Solution

Let's assume the speed of the second car is x km/h.

To find the speed of the second car, we can use the formula: distance = speed × time.

The distance traveled by the first car can be calculated as follows: Distance1 = Speed1 × Time1 Distance1 = 75 km/h × (3 + 2) h Distance1 = 75 km/h × 5 h Distance1 = 375 km

The distance traveled by the second car can be calculated as follows: Distance2 = Speed2 × Time2 Distance2 = x km/h × 3 h Distance2 = 3x km

Since the total distance between the two cities is 621 km, we can write the equation: Distance1 + Distance2 = Total Distance 375 km + 3x km = 621 km

Now, let's solve the equation to find the speed of the second car.

375 km + 3x km = 621 km 3x km = 621 km - 375 km 3x km = 246 km x km = 246 km / 3 x km ≈ 82 km/h

Therefore, the speed of the second car is approximately 82 km/h.

Answer

The speed of the second car is approximately 82 km/h.