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Vijay Sharma

· started a discussion

· 1 Months ago

GATE Question (Question: 292725.0 )

This question is from GATE 2017 Exam

Question:

A right angled cone with base radius 5 cm and height 12 cm, as shown in figure, is rolled on the ground keeping the point P fixed until the point Q (at the base of the cone, as shown) touches the ground again. By what angle about P does the cone travel?

  

Options:
A)

5p12    

B)

5p24    

C)

24p5    

D)

10p13    

Solution:

Ans: (d)

  

Vijay Sharma

· commented

· 1 Months ago

For a full turn of 2pi r in circle of radius 5 the cone will travell angle theta around P making arc l = @ r (@ is theta)

So 2pi 5 = @ 13

so @ = 10pi/13

Vijay Sharma

· commented

· 1 Months ago

infact there are some other questions from GATE 2017 too
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