Question

A model of an aeroplane is made to a scale of $1:400$. Calculate the length, in m, of the aeroplane, if the length of its model is $16$ cm.

• A. $68$ m
• B. $64$ m
• C. $54$ m
• D. none of the above

Answer 1

The correct option is B $64$ m

Scale $=k=$ $\frac{1}{400}$
Now, $\frac{\text{Length of model}}{\text{Length of aeroplane}}=k$
$\text{Length of aeroplace}=400\times 16$
$\text{Length of model}=6400$ cm
$\text{Length of model}=64$ m