Please help me with this question

Given that the area of PQRS is 45 cm²

Area of PXYS = 10cm²

Now , from the figure we can see that ,

Also , we see that ,

And , we know that area of rectangle as ,

Finding a :-

Finding b :-

idk

step-by-step explanation:

maybe try   if it is work from a book, if not try