Предмет: Математика, автор: 123730

нужно изготовить 1500 деталей один мастер может выполнить эту работу за 15ч а другой за 10ч за сколько времени оба мастера изготовят все детали работая одновременно?

Ответы

Автор ответа: Пеппер

Ответ:

6 часов.

Пошаговое объяснение:

1) 1500:15=100 (д.) в час изготовит первый мастер

2) 1500:10= 150 (д.) в час изготовит второй мастер

3) 100+150=250 (д.) изготовят оба мастера в час

4) 1500:250= 6 (ч.) потребуется двум мастерам

Предыдущий вопрос

Следующий вопрос

Похожие вопросы

Предмет: Физика, автор: himiko76

хелпаните с яклассом физика 8 класс

6 лет назад

Предмет: Английский язык, автор: shhskdowpamb

Read the text again and for each gap tick the correct option.

Jason lives in a big house near the sea. That’s not really unusual, is it? But Jason’s house is very big. There are 20 bedrooms, two kitchens, a big dining room for 40 people and a swimming pool, too! You’re probably thinking Jason has got a very big family, but you’re wrong! Jason lives in a hotel.

Jason’s parents own The Jackson Star Hotel in the lovely little seaside town of Barnaby. Lots of people go there in summer for their holidays and stay at Jason’s hotel. It’s very popular! Jason lives with his mum and dad in a small flat at the top of the hotel. They work in the hotel and Jason helps when he is not at school. He sometimes takes the rubbish out and makes the beds.

So, does Jason like living in a big hotel? Jason says, ‘Yes, I like my room. It’s very high up, and from one window I can see all over the town and from the other window I can see the sea. I’ve got a big desk in my room with a computer on it so I can do my homework. And I’ve got my own TV. My friends like staying here because the bedrooms are comfortable, and we get very good food! I like the people, too. They come from different places around the world.’

Is there anything he doesn’t like? Jason answers, ‘In the winter, there aren’t a lot of people here and I sometimes get frightened at night. The hotel is big and empty and it’s like a scary film!’

1. The hotel is very popular ___.
in summer
in winter
every holiday
2. Jason sometimes does ___ to help his parents.
homework
cooking
jobs
3. In winter Jason is sometimes frightened at night when ___.
there are no people staying
his parents go out
he watches films

6 лет назад

Предмет: Математика, автор: Аноним

срочно
пожалуйста
ааааааааааа

6 лет назад

Предмет: Химия, автор: mityafomin199

Какая масса соли образуется в
результате взаимодействия 150 г
раствора азотной кислоты с силикатом натрия.

9 лет назад

Предмет: Математика, автор: oliviya81

решить рациональным способом пример 80*30*300*50

9 лет назад