Just need help with this question:
A model aeoraplane is built to a scale of 1:80.If the wingspan of the mosel is 85cm, what is the wing span of the aeroplane.Btw , the answer is: 68m , i just dont know the solution, can i get help, thxs :)
+118608 Well the ratio is 1:80
This means that every 1cm on the model is really 80 cm on the real plane. SO
85cm on the model = 80*85cm on the real plane
80*85cm = 80*85/100 metres
$${\frac{{\mathtt{80}}{\mathtt{\,\times\,}}{\mathtt{85}}}{{\mathtt{100}}}} = {\mathtt{68}}$$
So the answer is 68 metres 
