The town of Cambley is 5 km east and p km north of Edwintown so that the position vector of Cambley from Edwintown is (5000 / 1000p) metres. Manjit sets out from Edwintown at the same time as Raj sets out from Cambley. Manjit sets out from Edwintown on a bearing of 020° at a speed of 2.5 m s⁻¹ so that her position vector relative to Edwintown after t seconds is given by (2.5t cos 70° / 2.5t cos 20°) metres. Raj sets out from Cambley on a bearing of 310° at 2 m s⁻¹.

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