Средняя скорость движения зерноуборочного комбайна по полю составляет 6,12 км/ч. за
какое время можно убрать урожай с поля шириной 450 ми длинной 1224 м? комбайн
имеет ширину захвата жатки 12 метров. каким по продолжительности должен быть
обеденный перерыв у комбайнёра, чтобы успеть убрать урожай за 8-ми часовой рабочий
день? ​

Для начала переведем 10,05 г в мг -> 10,05 г = 10.050 мг, т.к в 1 г = 1000 мг. Теперь переведем в мг остальные массы грузиков:
10 г = 10000 мг
5 г = 5000 мг
5 г = 5000 мг
Теперь нужно подобрать нужную массу. Допустим сначала на весы мы положим 10 г или 10.000 мг, тогда: 10.050 мг - 10.000 мг = 50 мг. Осталось 50 мг. Эту недостающую массу мы можем возместить остальными грузиками, масса которых не больше грамма, это 20 мг, 20 мг, 10 мг. Получается: 50 мг - (20 мг + 20 мг + 10 мг) = 0 мг. Следовательно весы уравновешены.
начало рассуждения такое же, но только вместо 10 000 мг на весы мы положим 2 грузика по 5000 мг: 10.050 мг - (5000 мг + 5000 мг) = 50 мг. Дальше решение прежнее: 50 мг - (20 мг + 20 мг + 10 мг) = 0 мг. И в данном случае весы уравновешены.

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