﻿ Python Math: Calculate surface volume and area of a sphere - w3resource # 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 The  area of a sphere is A = 4*π*r2 Sample Solution:-

Python Code:

``````pi=22/7
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
```

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## Python: Tips of the Day

Python: Get the Key Whose Value Is Maximal in a Dictionary

```>>> model_scores = {'model_a': 100, 'model_z': 198, 'model_t': 150}
>>> # workaround
>>> keys, values = list(model_scores.keys()), list(model_scores.values())
>>> keys[values.index(max(values))]
'model_z'
>>> # one-line
>>> max(model_scores, key=model_scores.get)
'model_z'
```