Can you describe the composite figure for us? There really isn't enough information to find a solution without making some assumptions.
Perhaps this is a cylindrical container with a bottom but no top?
If we consider each side of the equation separately we see that they each represent straight lines in the form y=mx+b (the slope-intercept form). The equation y=3x+14 is a line with slope of 3 and y-intercept of 14. The equation y=3x is a line with slope
of 3 and y-intercept of 0. These lines...
The first step is to determine where the ten-thousands place is. Most people 'count' the digits from right to left starting at the decimal point: "ones", "tens", "hundreds", "thousands", "ten thousands" -- five places left of the decimal point. In this case
the digit is 8.