Question

Из двух деревень навстречу друг другу выехали два мотоциклиста.скорость одного45 км,ч.скорость второго на 10 км больше.мотоциклисты встретились через 3 часа.какое растояние между пристанями? 2)длина прямоугольника15 см.а ширина на 5 см меньше.чему равен периметр,

Answer 1

Периметр равен= 1).15-5=10,2).10+10+15+15=50см

Answer 2

Problem 1: Two Motorcyclists Meeting

Two motorcyclists set off from two different villages towards each other. The first motorcyclist has a speed of 45 km/h, while the second motorcyclist has a speed that is 10 km/h faster than the first motorcyclist. They meet after 3 hours. We need to find the distance between the villages.

To solve this problem, we can use the formula: distance = speed × time.

Let's assume the distance between the villages is d kilometers.

The first motorcyclist travels at a speed of 45 km/h for 3 hours, covering a distance of 45 × 3 = 135 km.

The second motorcyclist travels at a speed of (45 + 10) = 55 km/h for 3 hours, covering a distance of 55 × 3 = 165 km.

Since they meet, the sum of the distances covered by both motorcyclists should be equal to the total distance between the villages:

135 km + 165 km = d

Simplifying the equation:

300 km = d

Therefore, the distance between the villages is 300 kilometers.

Problem 2: Perimeter of a Rectangle

The length of a rectangle is 15 cm, and the width is 5 cm less than the length. We need to find the perimeter of the rectangle.

To find the perimeter of a rectangle, we use the formula: perimeter = 2 × (length + width).

Let's substitute the given values into the formula:

Length = 15 cm Width = Length - 5 cm = 15 cm - 5 cm = 10 cm

Plugging these values into the formula:

Perimeter = 2 × (15 cm + 10 cm) = 2 × 25 cm = 50 cm

Therefore, the perimeter of the rectangle is 50 centimeters.