A right triangle with its sides 5cm and 13cm, is revolved at the side 12cm. The solid so formed is:
A
Cylinder
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B
Sphere
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C
Cone
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D
Triangle
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Solution
The correct option is C Cone Given, a Right-angled triangle with sides 5cm and 13cm is revolved at the side 12cm.
∴ base=5cm, perpendicular=12cm and hypotenuse=13cm.
Note:
A Cone is a Rotated Triangle. A cone can be made by rotating a triangle. The triangle is a right-angled triangle, and it gets rotated around one of its two short sides. The side it rotates around is the axis of the cone
And the above sides in the question forms a Right-angled triangle.Hence, the solid formed is a cone.