Answer :

The longer length of the rectangle is 1.5 and the area is 1.5 so 1.5 times what number gives 1.5 the answer will have to be 1 because 1*1.5 gives 1.5
the answer for the unknown side is A.1m ,
as to find a area of a shape in this case is a rectangle you times the high with the base.
SO ....
1.5m * 1m = 1.5m square.
hope this helps