Question

От двухпристаней одновременно навстречу друг другу 2 моторные лодки скорость первой 30 км ч и она прошла до встречи 90 км вторая лодка прошла до встречи 150 км какова её скорость

Answer 1

$t= \frac{S_1}{U_1}$
$1) t= \frac{90}{30 \frac{km}{4} }=3ch$
$U \frac{S_2}{t}$
$2) U_2= \frac{150}{3ch} =50 \frac{km}{4}$
Ответ:$U_2=50 \frac{km}{4}$

Answer 2

Problem Analysis

We have two motorboats traveling towards each other from two different ports. The first boat has a speed of 30 km/h and has traveled 90 km before the meeting point. The second boat has traveled 150 km before the meeting point. We need to find the speed of the second boat.

Solution

To find the speed of the second boat, we can use the formula:

Speed = Distance / Time

Let's calculate the time taken by each boat to reach the meeting point.

The first boat has traveled 90 km at a speed of 30 km/h. Therefore, the time taken by the first boat is:

Time taken by the first boat = Distance / Speed = 90 km / 30 km/h = 3 hours

Similarly, the second boat has traveled 150 km. Let's assume the speed of the second boat is x km/h. Therefore, the time taken by the second boat is:

Time taken by the second boat = Distance / Speed = 150 km / x km/h = 150 / x hours

Since the two boats are traveling towards each other, the total time taken by both boats to reach the meeting point is the same. Therefore, we can equate the time taken by the first boat to the time taken by the second boat:

3 hours = 150 / x hours

To solve for x, we can cross-multiply:

3 * x = 150

x = 150 / 3

x = 50

Therefore, the speed of the second boat is 50 km/h.

Answer

The speed of the second boat is 50 km/h.