Brake the T into 2 rectanglesso now you have a rectangle of 15L, 3W, and 3H, and a rectangle that is 10L, 3W, and 3H. now multiply 15,3, and 3 together, then you get 135. When you times 10,3, and 3 together, you get 90. Now, add together 135 and 90 and get 225.
Hope that was helpful, and PLEASE mark me most brainly!!
