We can use a scale conversation calculator.
The building 360 feet tall with a scale drawing of 2 inches represent 20 feet.
To find out how many inches represent 360 feet, we use the formula …
2 inches / 20 feet = x inches / 360 feet
We solve by cross multiplying
20ft (times) x inches = 2 inches * 360
X=(2 inches (times) 360 feet) / 20 feet
X = 36 inches