Question

Из двух городок в расстояние между которыми равно 408 км одновременно навстречу друг другу выехали два грузовика и встретились через четыре часа после начало движения скорость одного из них равна 54 километра в час найдите скорость второго грузовика

Answer 1

48 км/ч, тк 54*4+48*4=408

Answer 2

1) 408 : 4 = 102 (км/ч) - скор. сближения.
2) 102 - 54 = 48 (км/ч) - скор. второго груз.
Ответ: скорость второго грузовика равна: 48 км/ч.

Answer 3

Problem Analysis

To solve this problem, we can use the formula:

distance = speed * time

We know the distance between the two trucks is 408 km and they meet after 4 hours. We also know the speed of one of the trucks, which is 54 km/h. We need to find the speed of the second truck.

Calculating the Speed of the Second Truck

Using the formula distance = speed * time, we can calculate the speed of the second truck.

Let's denote: - d as the distance between the two trucks (408 km) - t as the time it takes for the trucks to meet (4 hours) - s1 as the speed of the first truck (54 km/h) - s2 as the speed of the second truck (which we need to find)

We can use the equation: d = (s1 + s2) * t

Solving for s2: s2 = (d / t) - s1

Substituting the given values: s2 = (408 / 4) - 54

Calculation

s2 = 102 - 54

s2 = 48 km/h

So, the speed of the second truck is 48 km/h.

(#1)