2025 YCKSS PRELIMS P1 Q11

2025 YCKSS PRELIMS P1 Q11

Secondary 4
4 marks

\(P=2w-\dfrac{x^2y}{w}\).

  1. Find \(P\) when \(w=86.3\), \(x=21.41\), and \(y=0.872\). Give the answer correct to 4 significant figures.[1]
  2. Rearrange the formula to make \(x\) the subject.[3]

Solution:

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Answer:(a) \(168.0\) (b) \(x=\pm\sqrt{\dfrac{2w^2-Pw}{y}}\)

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