Question

********Please show work*********

Answer 1

Since the real track has a gauge of 3 feet but the model railroad track has a gauge of 3/4 inches, the scale factor must be 1/4, because you must follow the rule

"true measurement * scale factor = model measurement"

In fact, we have

$3\cdot\dfrac{1}{4}=\dfrac{3}{4}$

This implies that the original driving wheels height, 44 inches, must be scaled down to

$44\cdot\dfrac{1}{4}=11$

inches.