27. The strength of a beam is directly proportional to its width w and the square of its depth d, and inversely proportional to its length I. How would the strength of the beam change if the width and length are doubled?

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Differential Equations

Have you ever observed the movement of the satellites and rockets or how the planets go around the sun in their orbits? How will you determine their motion? Definitely they follow some scientific laws and these kinds of problems are framed as differential equations.