SOLUTION:
Case: Circumference
Method:
Circumference, C= 53.40703
The height of the barrel described here is the diameter. Mario would have to jump a little above the diameter of the barrel but not too high to get to the fire.
The formula connecting the Circumference of a circle to its diameter is given as:
Final answer:
Mario has just jump a little above 16.99998564071 units high