Question

С противоположных концов катка длиной 450 м одновременно побежали навстречу 2 мальчика. Через сколько секунд они встретятся, если скорость 1-го мальчика 9 м/с, а в 2-го 6м/с.

Answer 1

450:(6+9)=30................................

Answer 2

Problem Analysis

Two boys are running towards each other from opposite ends of a 450m long rink. The speed of the first boy is 9 m/s, and the speed of the second boy is 6 m/s. We need to calculate how many seconds it will take for them to meet.

Solution

To find the time it takes for the boys to meet, we can use the formula:

Time = Distance / Relative Speed

The relative speed is the sum of their individual speeds since they are moving towards each other. Let's calculate the relative speed:

Relative Speed = Speed of Boy 1 + Speed of Boy 2

Substituting the given values:

Relative Speed = 9 m/s + 6 m/s = 15 m/s

Now, we can calculate the time it takes for them to meet:

Time = Distance / Relative Speed

Substituting the given distance:

Time = 450 m / 15 m/s = 30 seconds

Therefore, it will take 30 seconds for the boys to meet.

Answer

The boys will meet in 30 seconds.