Question

A right triangle with its sides $5cm$ and $13cm$, is revolved at the side $12cm$. The solid so formed is:

• A. Cylinder
• B. Sphere
• C. Cone
• D. Triangle

Answer 1

The correct option is C Cone

Given, a Right-angled triangle with sides $5$cm and $13$cm is revolved at the side $12$cm.

$\therefore$ base$=5$cm, perpendicular$=12$cm and hypotenuse$=13$cm.

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.

Hence, option $C$ is correct.