Question

Катер прошел расстояние между пунктами А и В со скоростью 63 км/ч за 4 часа. С какой скоростью должен двигаться катер, чтобы преодолеть это же расстояние за 3,5 часа? Решите алгебрагическим способом!!!!

Answer 1

1) 63 * 4 = 252 км расстояние
2) 252 : 3,5 = 72 км/ч должна быть скорость

Answer 2

Problem Analysis

We are given that a boat traveled a distance between points A and B at a speed of 63 km/h in 4 hours. We need to find the speed at which the boat should travel to cover the same distance in 3.5 hours.

Solution

Let's assume the distance between points A and B is d km.

We can use the formula speed = distance / time to find the speed at which the boat should travel.

For the first scenario, where the boat traveled the distance in 4 hours: - Speed = 63 km/h - Time = 4 hours - Distance = d km

Using the formula, we can write the equation as: 63 = d / 4 Now, we need to find the speed at which the boat should travel to cover the same distance in 3.5 hours: - Speed = ? - Time = 3.5 hours - Distance = d km

Using the formula, we can write the equation as: Speed = d / 3.5

To find the value of Speed, we can substitute the value of d from equation into the second equation: Speed = (63 * 3.5) / 4

Simplifying the equation, we get: Speed = 220.5 / 4

Therefore, the boat should travel at a speed of 55.125 km/h to cover the same distance in 3.5 hours.

Answer

The boat should travel at a speed of 55.125 km/h to cover the same distance between points A and B in 3.5 hours.

Note: The answer has been calculated using algebraic methods.