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pls answer 19 20

Q.19. Two concentric circles are of radii 6.5 cm and 2.5 cm. Find the length of the chord of larger circle which is tangent to smaller circle.

Q.20. Find the area of the shaded region in figure, if BC = BD = 8 cm, AC = AD = 15 cm and O is the centre of the circle. ( Take $\mathrm{\pi}$ = 3.14).

(Refer 2)

Q 19 https://www.meritnation.com/ask-answer/question/1-find-the-probability-that-a-non-leap-year-selected-at-ran/math/3950609

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