Question

Скорость мотоциклиста равна 72 километров час скорость велосипедиста на 20 км в час. а)какую часть скорости мотоциклиста составляет скорость велосипедиста ? б)во сколько раз скорость мотоциклиста больше скорости велосипедиста?

Answer 1

1) 5/13
2) 3.6
это всё решение

Answer 2

Calculation of the Relative Speed of the Bicyclist Compared to the Motorcyclist

To calculate the relative speed of the bicyclist compared to the motorcyclist, we need to determine the proportion of the bicyclist's speed to the motorcyclist's speed and the ratio of the motorcyclist's speed to the bicyclist's speed.

Let's denote the speed of the motorcyclist as M (72 km/h) and the speed of the bicyclist as B (20 km/h).

a) To find the proportion of the bicyclist's speed to the motorcyclist's speed, we divide the speed of the bicyclist by the speed of the motorcyclist:

Proportion of the Bicyclist's Speed to the Motorcyclist's Speed = B / M

Substituting the given values, we have:

Proportion of the Bicyclist's Speed to the Motorcyclist's Speed = 20 km/h / 72 km/h

b) To find the ratio of the motorcyclist's speed to the bicyclist's speed, we divide the speed of the motorcyclist by the speed of the bicyclist:

Ratio of the Motorcyclist's Speed to the Bicyclist's Speed = M / B

Substituting the given values, we have:

Ratio of the Motorcyclist's Speed to the Bicyclist's Speed = 72 km/h / 20 km/h

Now, let's calculate these values:

a) The proportion of the bicyclist's speed to the motorcyclist's speed is approximately 0.2778 or 27.78%.

b) The ratio of the motorcyclist's speed to the bicyclist's speed is approximately 3.6 or 360%.

Therefore, the speed of the bicyclist is approximately 27.78% of the speed of the motorcyclist, and the speed of the motorcyclist is approximately 360% (or 3.6 times) greater than the speed of the bicyclist.

I hope this helps! Let me know if you have any further questions.