About how tall is the Washington Monument?

Question

Iris is building a model of the Washington Monument. Her model measures 15 in. tall and is 1.5 in. wide at the base. The actual width measurement at the base of the Washington Monument is about 55 ft. About how tall is the Washington Monument?

Answer 1

We can work out the scale factor from the base measurements. 1.5"=55' so 10*1.5=15"=10*55=550'.

The model is 15" tall so the monument is 550' tall.

Answer 2

there is a scale between the model and the real size. since the actual width measurment is 55 the scale is

55/1.5=36.666 so the actual tall is 15(36.666)=550 in approx.