Explanation:
to find the area more easily, you can divide the figure.
make a small rectangle from the upper part (a 5×6 rectangle) then a square from the lower part (a 5×5 square).
now you have a small rectangle, a big rectangle and a square.
small rectangle: 5×6=30
big rectangle: 15×5=75
square:5×5=25
30+75+25=130
if anything is unclear, ask freely.