A water tank is a cylinder with radius radius_cm and height height_cm, both in centimetres. Write tank_litres(radius_cm, height_cm) that returns how many whole litres it can hold (round down). One litre is 1000 cubic centimetres.
Examples
Input: radius_cm = 50, height_cm = 100
Output: 785
Explanation: pi * 50² * 100 = 785398.16 cm³ = 785.39 L.
Input: radius_cm = 10, height_cm = 10
Output: 3
Input: radius_cm = 5, height_cm = 5
Output: 0
Constraints
0 <= radius_cm, height_cm <= 1000; values may be ints or floats- Use
math.pi; return an integer
Goals
- Use the cylinder volume formula
- Convert units and round down