**Covid-19 has led the world to go through a phenomenal transition .**

**E-learning is the future today.**

**Stay Home , Stay Safe and keep learning!!!**

Volume - Sphere = 4/3 π r^{3} |

1) A shot-putt is a metallic sphere of radius 4.9 cm. If the density of the metal is 7.8 g / cm

Mass = Volume x density

Volume = 4/ 3 π r

V = 4 /3 x 3.14 x 4.9.x 4.9 x 4.9

V = 492 .55 cm

Density = 7.8 g / cm

∴ Mass = V x D

⇒ Mass = 492.55 x 7.8 = 3841.89 g

∴ Mass = 3.84 kg

_________________________________________________________________

2) A capsule of medicine is in the shape of a sphere of diameter 3.5 mm. How much medicine ( in mm

∴ radius = r = 3.5 /2 = 1.75 mm =

Volume = 4/3 π r

⇒ V= 4/3 x 3.14 x ( 1.75)

⇒ V = 22.44 mm

_________________________________________________________________

3) Twenty seven solid iron sphere , each of radius r and surface area S are melted to form sphere with surface area S’. Find the radius r’ of the new sphere.

∴ Volume of 27 spheres = 27 (4/3 π r

Volume of new sphere = 4/3 π r’

∴ 4/3 π r’

∴ r’

∴ r’ = 3r

_________________________________________________________________

4) Find the volume of a sphere whose surface area is 154 cm

S = 4 π r

154 = 4 π r

r

∴ r

∴ r = 3.5 cm

Volume = 4/ 3 π r

V = 4 / 3 x 3.14 x (3.5)

∴ V = 179. 50 cm

• Volume Formulas

• Volume of Irregular Shape

• Volume of Cube

• Volume of Rectangular Prism(Cuboid)

• Volume of Cylinder

• Volume of Cone

• Volume of Sphere

• Volume Hemisphere

• Volume of Prism

• Volume of Pyramid

From Sphere to Home Page

**Covid-19 has affected physical interactions between people.**

**Don't let it affect your learning.**

GMAT

GRE

1st Grade

2nd Grade

3rd Grade

4th Grade

5th Grade

6th Grade

7th grade math

8th grade math

9th grade math

10th grade math

11th grade math

12th grade math

Precalculus

Worksheets

Chapter wise Test

MCQ's

Math Dictionary

Graph Dictionary

Multiplicative tables

Math Teasers

NTSE

Chinese Numbers

CBSE Sample Papers