A two-story building measures 21 feet from the ground. A scale model shows the building
to be 3 inches tall. How many inches would an
84-foot building be in the model?

Step-by-step explanation:

Given,

Measure of a two-story building (in feet)

= 21 feet

So, Measure of the building in (in inches)

= 3 inches

Therefore,

By the problem,

21 feet building

= 3 inches

So,

1 feet building

Then,

84 feet building

= 3 × 4 inches

= 12 inches

Hence,

84 feet building will measure 12 inches (Ans)

a² + b²= c²

24² + 7² = c²

c= 25