Question 207607
First find the linear scale.
You are told two areas are scaled at 1:2500
You know area is measured in squared linear dimension.
SO, what is the sqaureroot of 2500?
{{{sqrt(2500) = 50}}}

Thus the linear scale is 1:50

Now, you are asked about 'capacity of the petrol tanks'. That is a volume. And volume are in cubic dimensions.
So the scale needs to be cubed
{{{1^3:50^3}}}
{{{1:125000}}}
wow