Question

Два парохода вышли из порта следуя один на север другой на запад. скорости их равны соответственно 21км/ч и 20км/ч. какое расстояние ( в километрах) будет между ними через 3 часа?

Answer 1

21 + 20 = 41км/ч - скорость удаления.
41 * 3 = 123км

Answer 2

Calculation of Distance between Two Ships

To calculate the distance between the two ships after 3 hours, we need to determine the distance each ship has traveled in that time.

Ship 1 is traveling north at a speed of 21 km/h, so after 3 hours, it will have traveled a distance of 21 km/h * 3 hours = 63 kilometers.

Ship 2 is traveling west at a speed of 20 km/h, so after 3 hours, it will have traveled a distance of 20 km/h * 3 hours = 60 kilometers.

Therefore, the distance between the two ships after 3 hours will be the hypotenuse of a right triangle with sides measuring 63 kilometers and 60 kilometers. We can use the Pythagorean theorem to calculate this distance.

Using the Pythagorean theorem, the distance between the two ships after 3 hours is:

√(63^2 + 60^2) = √(3969 + 3600) = √7569 = 87 kilometers.

So, the distance between the two ships after 3 hours will be approximately 87 kilometers.

Please note that the above calculation assumes that the ships are traveling in a straight line and at a constant speed.