Moon Anh

2 năm trước

1 gia đình sử dụng 1 bếp điện có ghi 220V-800w được sử dụng với hiệu điện thế 220V để đun 2 lít nước ở nhiệt độ ban đầu là 20°C thì mất thời gian là 20 phút hỏi trong 30 ngày phải trả bao nhiêu tiền điện cho việc đun nước Biết 1kwh là 1500đ giúp mình với ạ

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quangdoan

2 năm trước

Đáp án:

$10500vnđ$

Giải thích các bước giải:

Đổi $20phút=\frac{1}{3}h$

Công suất tiêu thụ trong 1 tháng là:

$E=800.\frac{1}{3}.30$=7000Wh=7kWh$

Số tiền: $M=7.1500=10500vnđ$

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Choose the best answer.
I think you should buy ___ pack of mineral water instead. And you can also buy _ snacks such as potato crisps, 3 kilos of mandarins, 2 kilos of apples, 3 bunches of bananas, ____ cookies and soft candies.

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I think that ______ cauliflower is not enough for 3 people. Let’s buy one more.

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Viết một đoạn văn hoàn chỉnh về lý do học tiếng Anh bằng cách đưa ra các manh mối ( ko chép mạng nhá)

việt nam dành độc lập vào năm nào

Choose the best answer.I think you should buy _____ pack of mineral water instead. And you can also buy _____ snacks such as potato crisps, 3 kilos of mandarins, 2 kilos of apples, 3 bunches of bananas, ______ cookies and soft candies.

Choose the best answer.We should decorate our living room with _____ orange banner. We also need ________ ribbons, balloons, party hats and costume.

Choose the best answer.I think that ______ cauliflower is not enough for 3 people. Let’s buy one more.

Đề thi - đề kiểm tra Xem thêm

Choose the best answer.
I think you should buy ___ pack of mineral water instead. And you can also buy _ snacks such as potato crisps, 3 kilos of mandarins, 2 kilos of apples, 3 bunches of bananas, ____ cookies and soft candies.

Choose the best answer.
We should decorate our living room with _ orange banner. We also need ____ ribbons, balloons, party hats and costume.

Choose the best answer.
I think that ______ cauliflower is not enough for 3 people. Let’s buy one more.