You measure the different dimensions and then divide one by the other.
standard dimension ratio
It is the scale factor.
8.125 inches
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what is the compression ratio,boreXstroke & dimension of 4g69 engine.
[m][l]^-3
Ratio scales and Bar scales are two scales that can determine the actual distance. Ratio scale is describes as the ratio of units in a smaller dimension. Bar scales make use of graphic lines to find the distance.
That would be: 29.87 x 90 cm
The scale factor between two similar shapes is the ratio of the dimensions of one (often the smaller) compared with the dimension of the other (the larger).
"Oval" can be a variety of shapes. I suggest you use the equation for the area of an ellipse. Assume some convenient ratio of length-to-width.
This depends on the ratio liquid/solid, type of marble, temperature, pressure, stirring, marble granules dimension, vinegar concentration etc.
Efficiency is a ratio of the same quantities. Usually, output power / input power. As the numerator and denominator have the same quantities, the dimensions cancel each other out.