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TRINA DAS

· started a discussion

· 1 Months ago

how does the line come?? (Question:660061.0)

AD is not a hypotenuse. Then how is it calculated?? (in last line)

Question:

The radii of two concentric circles are 13 cm and 8 cm AB is a diameter of the bigger circle and BD is a tangent to the smaller circle touching it at D and the bigger circle at E. Point A is joined to D. The length of AD is –

Options:
A)

20 cm

B)

19 cm

C)

18 cm

D)

17 cm

Solution:

Ans: (b)


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