Question

З міста одночасно у протилежних напрямках вирушили два поїзди. Яка відстань буде між поїздами через 3год, якщо швидкість першого поїзда 80км год, а другого 60км год??? Ширина прямокутника 7дм, а довжина на 9дм більша. Яка площа прямокутника??? З двох міст одночасно назустріч один одному віїхали два мотоциклісти, Зустрілися вони через 2год. Перший мотоцикліст рухався зі швидкістю 55км год, а другий 60км год, яка відстань між містами???

Answer 1

3*60=180 км проедет один поезд
3*80=240 км проедет другой
180+240=420 км будет расстояние между поездами через 3 часа
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7 дм + 9 дм=16 дм длинна
7 дм * 16 дм =112 кв дм площадь прямоугольника
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2*55=110 км проехал один мотоциклист
2*60=120 км проехал другой
110+120=230 км между городами

Answer 2

Calculation of Distance between Trains

To calculate the distance between the two trains after 3 hours, we can use the formula: distance = speed * time.

Given that the speed of the first train is 80 km/h and the speed of the second train is 60 km/h, we can calculate the distances traveled by each train after 3 hours.

The distance traveled by the first train after 3 hours is: 80 km/h * 3 h = 240 km [[1]].

The distance traveled by the second train after 3 hours is: 60 km/h * 3 h = 180 km [[2]].

Therefore, the distance between the two trains after 3 hours will be the sum of the distances traveled by each train: 240 km + 180 km = 420 km.

So, the distance between the two trains after 3 hours will be 420 kilometers.

Calculation of Rectangle Area

To calculate the area of a rectangle, we can use the formula: area = length * width.

Given that the width of the rectangle is 7 dm and the length is 9 dm, we can substitute these values into the formula to find the area.

The area of the rectangle is: 7 dm * 9 dm = 63 square dm.

Therefore, the area of the rectangle is 63 square decimeters.

Calculation of Distance between Motorcyclists

To calculate the distance between the two cities, we can use the formula: distance = speed * time.

Given that the first motorcyclist is traveling at a speed of 55 km/h and the second motorcyclist is traveling at a speed of 60 km/h, and they meet after 2 hours, we can calculate the distances traveled by each motorcyclist.

The distance traveled by the first motorcyclist after 2 hours is: 55 km/h * 2 h = 110 km.

The distance traveled by the second motorcyclist after 2 hours is: 60 km/h * 2 h = 120 km.

Therefore, the distance between the two cities is the sum of the distances traveled by each motorcyclist: 110 km + 120 km = 230 km.

So, the distance between the two cities is 230 kilometers.