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Python Math: Calculate surface volume and area of a sphere

Python Math: Exercise-6 with Solution

Write a Python program to calculate surface volume and area of a sphere.
Note: A sphere is a perfectly round geometrical object in three-dimensional space that is the surface of a completely round ball.

Python: Surface volume and area of a sphere

A sphere is a perfectly round geometrical object in three-dimensional space that is the surface of a completely round ball.

In three dimensions, the volume inside a sphere is derived to be V = 4/3*π*r3 where r is the radius of the sphere

Python: Volume of a sphere

The  area of a sphere is A = 4*π*r2

Python: Area of a sphere

Sample Solution:-

Python Code:

pi=22/7
radian = float(input('Radius of sphere: '))
sur_area = 4 * pi * radian **2
volume = (4/3) * (pi * radian ** 3)
print("Surface Area is: ", sur_area)
print("Volume is: ", volume)

Sample Output:

Radius of sphere: .75                                                                                         
Surface Area is:  7.071428571428571                                                                           
Volume is:  1.7678571428571428

Flowchart:

Flowchart: Calculate surface volume and area of a sphere

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Previous: Write a Python program to calculate surface volume and area of a cylinder.
Next: Write a Python program to calculate arc length of an angle.

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Python: Tips of the Day

Find current directory and file's directory:

To get the full path to the directory a Python file is contained in, write this in that file:

import os 
dir_path = os.path.dirname(os.path.realpath(__file__))

(Note that the incantation above won't work if you've already used os.chdir() to change your current working directory, since the value of the __file__ constant is relative to the current working directory and is not changed by an os.chdir() call.)

To get the current working directory use

import os
cwd = os.getcwd()

Documentation references for the modules, constants and functions used above:

  • The os and os.path modules.
  • The __file__ constant
  • os.path.realpath(path) (returns "the canonical path of the specified filename, eliminating any symbolic links encountered in the path")
  • os.path.dirname(path) (returns "the directory name of pathname path")
  • os.getcwd() (returns "a string representing the current working directory")
  • os.chdir(path) ("change the current working directory to path")

Ref: https://bit.ly/3fy0R6m