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Mathematics for IGCSE & O level - Rates (Section 1 - No. 13)

Find the force needed to exert a pressure of 15 N/m² on an area of 0.8 m².
10 N
11 N
12 N
15 N

解释

Force = Pressure x Area. 15 N/m² * 0.8 m² = 12 N

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