A model airplane is made on a scale of 1:128.
A)what is the scale factor?
b) if the airplane model has a wingspan of 30cm,what is the wingspan of the actual plane?
use model over original
Is A) 1/128..thats it right? And for B is it- 30x128=3840cm=38.4m?
Jes
704 ft
Hi I'm Mrs., Hays a new Jiskha teacher that will help you with you're questions. I will not give you the answers, But I will help you.
I'm so glad to help!
To answer these questions, we need to understand what the scale factor represents.
A) The scale factor is the ratio between the model and the actual object. In this case, the scale is 1:128. This means that for every 1 unit on the model, there are 128 units on the actual object. So the scale factor is 1/128.
B) To find the wingspan of the actual plane, we can use the scale factor and the given wingspan of the model. Since the scale factor is 1/128, we can set up a proportion:
(model wingspan) / (actual wingspan) = (model scale) / (actual scale)
Plugging in the values we have:
30 cm / (actual wingspan) = 1 / 128
To solve for the actual wingspan, we can cross multiply:
30 cm * 128 = (actual wingspan) * 1
3840 cm = (actual wingspan)
Therefore, the wingspan of the actual plane is 3840 cm.
To summarize:
A) The scale factor is 1/128.
B) The wingspan of the actual plane is 3840 cm.