Question

Решите задачу 1)спутник земли запустили со скоростью 7.9/10 км/с какое растояние он пролетит за 8с ?2)скорость пешехода 4.1/2 км/ч. какое растояние он проидёт за 3.1/3ч?3)сторона квадрута равна 3/4дм наидите его пириметыр и его площадь

Answer 1

1)спутник земли запустили со скоростью 7.9/10 км/с какое растояние он пролетит за 8с ?
7  9/10 =79/10 км/c скорость за 1 с
тогда за 8 секунд он пролетит 79/10*8=79*4/5=316/5=63 1/5 км
2)скорость пешехода 4.1/2 км/ч. какое растояние он проидёт за 3.1/3ч?

4 1/2 = 9/2 - скорость пешехода за 1 ч
за 3  1/3 часа он пройдет 10/3 * 9/2= 5*3=15
3)сторона квадрута равна 3/4дм наидите его пириметыр и его площадь
Периметр = 3/4*4=3 дм
Площадь = 3/4*3/4=9/16 дм кв

Answer 2

Problem 1: Distance traveled by a satellite

To find the distance traveled by a satellite, we can use the formula: distance = speed × time.

Given: - Speed of the satellite = 7.9/10 km/s - Time = 8 s

Using the formula, we can calculate the distance traveled by the satellite:

distance = speed × time

distance = (7.9/10) km/s × 8 s

To solve this, we can multiply the speed and time:

distance = (7.9/10) × 8 km

Calculating this, we get:

distance = 6.32 km

Therefore, the satellite will travel a distance of 6.32 km in 8 seconds. [[1]]

Problem 2: Distance traveled by a pedestrian

To find the distance traveled by a pedestrian, we can use the formula: distance = speed × time.

Given: - Speed of the pedestrian = 4.1/2 km/h - Time = 3.1/3 hours

Using the formula, we can calculate the distance traveled by the pedestrian:

distance = speed × time

distance = (4.1/2) km/h × (3.1/3) hours

To solve this, we can multiply the speed and time:

distance = (4.1/2) × (3.1/3) km

Calculating this, we get:

distance = 6.775 km

Therefore, the pedestrian will travel a distance of 6.775 km in 3.1/3 hours. [[2]]

Problem 3: Perimeter and area of a square

To find the perimeter and area of a square, we need to know the length of its sides.

Given: - Length of a side of the square = 3/4 dm

To find the perimeter of the square, we can use the formula: perimeter = 4 × side length.

perimeter = 4 × (3/4) dm

Simplifying this, we get:

perimeter = 3 dm

Therefore, the perimeter of the square is 3 dm.

To find the area of the square, we can use the formula: area = side length × side length.

area = (3/4) dm × (3/4) dm

Simplifying this, we get:

area = 9/16 dm²

Therefore, the area of the square is 9/16 dm². [[3]]

Summary:

1) The satellite will travel a distance of 6.32 km in 8 seconds. 2) The pedestrian will travel a distance of 6.775 km in 3.1/3 hours. 3) The square has a perimeter of 3 dm and an area of 9/16 dm².