NCO Cyber Olympiad (SOF) Class 10: Questions 1 of 461
» Mental Ability » Basic Geometry
MCQ▾
Question
The Volume of a solid metallic sphere is 2512 . It is melted and recast into solid right circular cones of radius 5 cm and height 16 cm. Calculate the number of cones recast.
Choices
Choice (4)  Response  

a.  9 

b.  6 

c.  8 

d.  7 

Answer
b.
Explanation

As given, the volume of a solid metallic sphere is 2512 .

Then it is melted and recast into solid right circular cones of radius 5 cm and height 16 cm.

Now, as we know, the formula of Volume of a right circular cone is: , where, r = radius and h = height.

Therefore, volume of a right circular cone is:


Hence, the number of cones recast are:



cones
