In Madurodam, one of the models of a windmill is 1.2 meters tall and 0.8 meters wide. The width of the actual windmill is 20 meters. What is its height?

Ratio (model measure to actual measure) = model measure / actual measure

dа ta:

model width=0.8 m

actual width=20 m

Ratio=0.8 m / 20 m=0.04

ratio = model height / real height ⇒ real height=model height / ratio

dа ta:

ratio=0.04

model height=1.2 m

Therefore:

real height=1.2 m / 0.04=30 m

Answer: the height is 30 m.

Other method:

model width/actual width=model height / actual height

dа ta:

model width=0.8 m

actual width=20 m

model height=1.2 m

Therefore:

0.8 m / 20 m=1.2 m / actual height

0.04 = 1.2 m / actual height

actual height=1.2 m / 0.04 = 30 m

Answer:the height is 30 m