Q : 9    A right circular cylinder just encloses a sphere of radius \small r (see Fig. \small 13.22). Find
           

           (ii) curved surface area of the cylinder,

            

Answers (1)

Given,

The radius of the sphere = r

\therefore The surface area of the sphere = 4\pi r^2

According to the question, the cylinder encloses the sphere.

Hence, the diameter of the sphere is the diameter of the cylinder. 

Also, the height of the cylinder is equal to the diameter of the sphere.

 We know, the curved surface area of a cylinder = 2\pi rh

= 2\pi r(2r) = 4\pi r^2

Therefore, the curved surface area of the cylinder is 4\pi r^2

Most Viewed Questions

Related Chapters

Preparation Products

Knockout NEET 2024

Personalized AI Tutor and Adaptive Time Table, Self Study Material, Unlimited Mock Tests and Personalized Analysis Reports, 24x7 Doubt Chat Support,.

₹ 40000/-
Buy Now
Knockout NEET 2025

Personalized AI Tutor and Adaptive Time Table, Self Study Material, Unlimited Mock Tests and Personalized Analysis Reports, 24x7 Doubt Chat Support,.

₹ 45000/-
Buy Now
NEET Foundation + Knockout NEET 2024

Personalized AI Tutor and Adaptive Time Table, Self Study Material, Unlimited Mock Tests and Personalized Analysis Reports, 24x7 Doubt Chat Support,.

₹ 54999/- ₹ 42499/-
Buy Now
NEET Foundation + Knockout NEET 2024 (Easy Installment)

Personalized AI Tutor and Adaptive Time Table, Self Study Material, Unlimited Mock Tests and Personalized Analysis Reports, 24x7 Doubt Chat Support,.

₹ 3999/-
Buy Now
NEET Foundation + Knockout NEET 2025 (Easy Installment)

Personalized AI Tutor and Adaptive Time Table, Self Study Material, Unlimited Mock Tests and Personalized Analysis Reports, 24x7 Doubt Chat Support,.

₹ 3999/-
Buy Now
Boost your Preparation for JEE Main with our Foundation Course
 
Exams
Articles
Questions