Question

Mr. Kumar, a Mathematics teacher brings some green coloured clay in the classroom to teach the topic 'mensuration'. First, he forms a cylinder of radius 6 cm and height 8 cm with the clay. Then, he moulds that cylinder into a sphere. Similarly, he moulds the sphere in other different shapes. Answer the following
i) Which of the following is not a 3D shape?

(a)cuboid (b)rectangle (c ) sphere (d) cone

(ii) What is the volume of cylindrical (in cm3

)shape?

(a)268π (b) )288π (c ) )36π (d) ) None of these

(iii) What is the volume of sphere ?

(a) 2

3 πr

3

(b) πr

3

(c ) 1

3πr

3

(d) 4

3πr

3

(iv) When clay changes into a shape to another which of the following remains same ?

(a) volume (b) curved surface area (c ) area (d) radius

(v) The radius of the sphere formed is :

(a) 4 cm (b) 5cm (c ) 6cm (d) None of these​

Answer 1

Answer:

1. cuboid

2.288π

4.volume

5.6cm