Question

За 2/3 часа колесо ветряной мельницы делает 600 оборотов.Сколько оборотов сделает это колесо за полчаса?

Answer 1

2/3 часа это 40 минут. За 40 минут 600 оборотов значит за 1 минуту 600/40=15 оборотов. Полчаса=30 минут. Значит за 30 минут 30*15=450 обротов.

Answer 2

1) 2/3 часа = 40минут

2) 600 делим на 40 =  15 оборотов в минуту

3) 15 умножаем на 30 =  450 оборотов за полчаса 

Answer 3

Calculation of Wheel Rotations

To calculate the number of wheel rotations in half an hour, we can use the given information that the windmill wheel completes 600 rotations in 2/3 of an hour.

Let's break down the calculation step by step:

1. Determine the number of rotations per minute: Since there are 60 minutes in an hour, we need to find the number of rotations per minute. We can do this by dividing the total number of rotations (600) by the total number of minutes in 2/3 of an hour (40 minutes).

Number of rotations per minute = Total rotations / Total minutes Number of rotations per minute = 600 rotations / 40 minutes = 15 rotations per minute

2. Calculate the number of rotations in half an hour: Now that we know the number of rotations per minute, we can calculate the number of rotations in half an hour (30 minutes).

Number of rotations in half an hour = Number of rotations per minute × Total minutes Number of rotations in half an hour = 15 rotations per minute × 30 minutes = 450 rotations

Therefore, the windmill wheel will make 450 rotations in half an hour.