Official papers

Official 2017 Paper 1 · Q6

Paper 1Geometry

A tangent to the circle x2+y2=144x^2+y^2=144 passes through the point (20,0)(20,0) and crosses the positive yy-axis.

What is the value of yy at the point where the tangent meets the yy-axis?

A1212
B1515
C493\frac{49}3
D2020
E643\frac{64}3
F803\frac{80}3

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