NCHMCT JEE 2015 Question Paper with solutions for online practice

Question : 1 of 200

Marks: +1, -0

What is the radius of a cylinder’s base if it is formed by melting a sphere of radius 7 cm when the height of the cylinder is 28/3 cm?

Solution:

Volume of sphere = Volume of cylinder
⇒

4/3πr^3

πr^2h

⇒

4/3

× 7 × 7 × 7 =

R^2 × {28}/3

⇒

R^2

= 49 ⇒ R = 7 cm
∴ Radius of cylinder = 7 cm

Go to Question:

Next Question