Question

If we rotate a right-angled triangle of height $5cm$ and base $3cm$ about its base, we get

• A. cone of height $3cm$ and base $3cm$
• B. cone of height $5cm$ and base $5cm$
• C. cone of height $5cm$ and base $3cm$
• D. cone of height $3cm$ and base $5cm$

Answer 1

The correct option is D

cone of height $3cm$ and base $5cm$

Explanation for correct option

Here is given a right-angled triangle with height $5cm$and base $3cm$.

Rotate it about its base and it will look like a cone after rotation as shown below.

Base and height of cone will interchange after rotation.

Thus, the Height of a cone will be $3$cm and the base of a cone will be $5$cm.

Hence, option (D) is the correct answer.