Question 434981
Area of parallelogram = b * h = base * height.
Then 
{{{A[s]/A[b] = (h[s]/h[b])^2}}}
<==> {{{80/125 = (h[s]/10)^2}}}
{{{16/25 = (h[s]/10)^2}}}
{{{4/5 = h[s]/10}}} ==> {{{h[s] = 8}}} meters.
==> base of smaller parallelogram is 80 m^2/8 m = 10 meters.
==>  base of larger parallelogram is 125 m^2/10 m = 12.5 meters.