Question

The first jumbo jet was the Boeing 747, which is 70.5 meters long. The wingspan of the 747 is 60 meters. A model 747 has a wingspan of 80 centimeters. What should the length of the model be? tell your work.

Answer 1

94 cm

Explanation:

Write and solve an equation of ratios:

70.5 m 60 m

----------- = -----------

L 80 cm

Cross multiplying, we get:

(70.5 m)(80 cm) = (60 m)L

(70.5 m)(80 cm)

Then the model length, L, should be L = -------------------------

60 m

or

L = 94 cm

Answer 2

Answer: The correct answer is 94 cm.

Step-by-step explanation:

wingspan length

60 meters 70.5 m

----------------- = ----------------

80 cm x

Cross multiply

(60 m)x = (70.5 m)(80 cm)

Solve for x by dividing both sides of equation by 60 m:

x = (70.5 m)(80 cm) / (60 m) = 94 cm

The length of the model is 94 cm.