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isha mishra

· started a discussion

· 1 Months ago

wrong answer (Question: 388295.0 )

the correct answer is 30.....formula:

direct tangent = sq root of d2 - (a-b)2

where, d= distance between the center of the circles

a and b are the radius
2 means square in the above formula....mind it.....

Question:

Triangle ABC is a right angle triangle, right angled at B. A large circle of radius 4 cm touches the three sides of the triangle and  and a small circle, with radius 1 cm. The length of AB is –  

  

Options:
A)

28 cm

B)

30 cm

C)

32 cm

D)

24 cm

Solution:

Ans: (c)

  

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