Physics, 18.10.2021 08:30 angelafisher886

Chiều dài của kim phút một đồng hồ là 20cm, của kim giờ là 15cm. Tỷ số tốc độ dài của đầu kim phút so với đầu kim giờ là:

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Chiều dài của kim phút một đồng hồ là 20cm, của kim giờ là 15cm. Tỷ số tốc độ dài của đầu kim phút s...

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