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McGraw Hill Integrated II, 2012 View details

7. Scale Drawings and Models

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Exercise 19 Page 604

Create a proportion using the scale factor.

≈329 feet

Practice makes perfect

We are given that the Eiffel Tower in Paris, France, is 986 feet tall and that the scale factor of a replica to the actual tower is approximately 1:3. To find the height of the replica, h, we will create a proportion using the given information. h/986= 1/3 Let's solve the above proportion using cross multiplication.

h/986=1/3

CrossMult

Cross multiply

h*3=986*1

Multiply

3h=986

DivEqn

.LHS /3.=.RHS /3.

h=328.666...

RoundInt

Round to nearest integer

h≈ 329