1. Một máy bơm lớn dùng để bơm nước trong một ao, một giờ nó bơm được 2100m3 nước lên cao 3m. Tính công suất của bơm. Biết trọng lượng riêng của nước là 10N/dm3. A. P = 18kW B. P = 17,5kW C. P =19kW D. P = 18,5kW 2. Một máy bơm lớn dùng để bơm nước trong một ao, một giờ nó bơm được 2100m3 nước lên cao 3m. Tính công suất của bơm. Biết trọng lượng riêng của nước là 10N/dm3. A. P = 18kW B. P = 17,5kW C. P =19kW D. P = 18,5kW ( giúp mình với nhé, mình đang gấp ạ)

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