Question

find the volume of metal used in making a hollow hemisphere ball with internal and external diameter 4 cm and 10 respectively. need solution answer is 245.14 cmcube

Answer 1

The volume of metal used is 245.14 cubic cm

Step-by-step explanation:

Internal diameter of hemisphere = 4 cm

Internal Radius of hemisphere r =$\frac{4}{2}= 2 cm$

External diameter of hemisphere = 10 cm

External Radius of hemisphere R =$\frac{10}{2}= 5 cm$

Volume of metal used = Outer volume - Inner volume

                                      = $\frac{2}{3} \pi R^3- \frac{2}{3} \pi r^3$

                                    =$\frac{2}{3} \times \frac{22}{7}(5^3-2^3)$

                                   =$245.14 cm^3$

Hence the volume of metal used is 245.14 cubic cm

#Learn more:

Find the volume of metal used to construct a hollow metallic sphere of internal and external diameters as 10 cm and 13 cm respectively.

https://brainly.in/question/1130348

Answer 2

Answer:

Internal diameter of hemisphere = 4 cm

Internal Radius of hemisphere r =\frac{4}{2}= 2 cm

2

4

=2cm

External diameter of hemisphere = 10 cm

External Radius of hemisphere R =\frac{10}{2}= 5 cm

2

10

=5cm

Volume of metal used = Outer volume - Inner volume

= \frac{2}{3} \pi R^3- \frac{2}{3} \pi r^3

3

2

πR

3

−

3

2

πr

3

=\frac{2}{3} \times \frac{22}{7}(5^3-2^3)

3

2

×

7

22

(5

3

−2

3

)

=245.14 cm^3245.14cm

3