Question

Самолёт за 20 мин пролетел 300 км. Какое расстояние он преодолеет за 2 часа полёта, двигаясь с такой же скоростью?

Answer 1

1 час = 60 минут
20 минут = $\frac{20}{60} = \frac{1}{3}$ часа

1) v=S:t=300:$\frac{1}{3}$ = 300*3=900 (км/ч) - скорость самолёт.
2) S=v*t=900*2=1800 (км) - пролетит самолёт за 2 часа.
ОТВЕТ: 1800 км.

или
1) 300:20=15 (км/мин.) - скорость самолёта
2) 2 часа = 120 мин.
S=v*t=120*15=1800 (км) - пролетит самолёт за 120 мин. (2 часа)
ОТВЕТ: 1800 км.

Answer 2

Problem Analysis

We are given that a plane traveled 300 km in 20 minutes. We need to find the distance it will cover in 2 hours while moving at the same speed.

Solution

To find the distance the plane will cover in 2 hours, we need to convert 2 hours to minutes and then use the speed of the plane to calculate the distance.

1 hour is equal to 60 minutes, so 2 hours is equal to 2 * 60 = 120 minutes.

Since the plane traveled 300 km in 20 minutes, we can calculate the distance it will cover in 120 minutes using the following proportion:

20 minutes = 300 km 120 minutes = ? km

To solve this proportion, we can use cross-multiplication:

20 minutes * ? km = 300 km * 120 minutes

Simplifying the equation:

? km = (300 km * 120 minutes) / 20 minutes

Calculating the result:

? km = 1800 km

Therefore, the plane will cover a distance of 1800 km in 2 hours while moving at the same speed.

Answer

The plane will cover a distance of 1800 km in 2 hours while moving at the same speed.