Hi,

i think u can use following way

Let the sides of first rectangle be 5x & 5y

than other has 4x & 4y

for covering u need to see the area(else see the unit of quantity given)

now, u have

area of first =25x*y=250......(1)

u have to find

area of second =16x*y=?.....(2)

u can get the value from (1) put it in (2) u get the ans.