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KVPY SX SB Exam 19-Nov-2017 Question Paper

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Question : 19

Total: 120

A spherical ball is kept at the corner of a rectangular room such that the ball touches two (Perpendicular) walls and lies on the floor. If a point on the sphere is at distances of 9, 16, 25 from the two walls and the floor, then a possible radius of the sphere is

13
15
26
36

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