Q-ID: 76485
A-ID:
The area `A` of an ellipse is given by `A = πab`.
The diagram shows two circles and an ellipse, all centred at the origin.
The equations of the circles are `x2 + y2 = 36` and `x2 + y2 = 16`.
The area of the shaded region is `kpi`.
Find the value of `k`.
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