Question

Из двух городов, расстояние между которыми равна 556 км, одновременно выехали навстречу друг другу два автомобиля и встретились через 4 ч после начала движения. Скорость одного из автомобилей равна 64 км/ч. Найдите скорость второго автомобиля

Answer 1

1) 556/4=139(км/ч) 2) 139-64=75(км/ч )

Answer 2

1)556:4=139 2)139-64=75

Answer 3

Problem Analysis

We are given that two cars start simultaneously from two cities and meet each other after 4 hours of travel. The distance between the two cities is 556 km. We are also given the speed of one of the cars, which is 64 km/h. We need to find the speed of the second car.

Solution

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

We can use the formula: Speed = Distance / Time to find the time taken by each car to meet.

For the first car: - Speed = 64 km/h - Distance = 556 km - Time = Distance / Speed = 556 km / 64 km/h

For the second car: - Speed = x km/h - Distance = 556 km - Time = Distance / Speed = 556 km / x km/h

Since both cars meet after 4 hours, we can set up the equation:

Time taken by the first car + Time taken by the second car = 4 hours

556 km / 64 km/h + 556 km / x km/h = 4 hours

Now, we can solve this equation to find the value of x.

Calculation

Let's calculate the value of x using the given information.

556 km / 64 km/h + 556 km / x km/h = 4 hours

Simplifying the equation:

(556 / 64) + (556 / x) = 4

8.6875 + (556 / x) = 4

556 / x = 4 - 8.6875

556 / x = -4.6875

x = 556 / -4.6875

x ≈ -118.6 km/h

Since speed cannot be negative, we can conclude that there is an error in the given information or calculations. Please double-check the values provided.

If you have any further questions, feel free to ask.