### Calculate the length of ps in kilometres

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##### Reference no: EM131031979

Q and S lie in a circle, radius 7.8 kilometres, centre C. CQis extended by 200 metres to P. PS is a tangent to the circle at S.

1. Write down the length of PC in kilometres.

2. Calculate the length of PS in kilometres

3. Calculate the area of triangle PSC. give your answer correct to 2 significant figures

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