Question

The ratio of length to width of a rectangular park is 8:5. If the width is 85 m, find its length

Answer 1

Let length be 8x and width be 5x.
8x:5x is the ratio.
If 5x is 85 then x is 17.
Therefore 8x is
$8 \times 17 = 289$
So your answer is 289.
Hope It helps.