A right – angled cone (with base radius 5cm and height

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A right – angled cone (with base radius 5cm and height 12cm), as shown in the figure below, 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 (in radians) about P does the cone travel?

[GATE ME 2017 Set 1]

A

B

C

D