[FEATURE] Write simC code for question 113

[Siddhartha Dhar Choudhury]

Question

Find the volume of a cylinder with height 21cm and radius 6cm. Express the result in metres.

Where to put the code?

In simc-codes directory

What to name the file?

q113.simc

Note: You can only start doing a question if it has been assigned to you by a maintainer. Once assigned to someone this questions will not be reassigned, it can only be reassigned if the person does not complete his/her task."

[Pritkumar Godhani]

I can do this @frankhart2018 .

[Siddhartha Dhar Choudhury]

Sure assigning this to you @prit108.