Answer:
A = 266cm
Step-by-step explanation:
b = 7
h = 8
l = 10
s = 7
A = bh + 2ls + lb
A = (7)(8) + 2(10)(7) + (10)(7)
A = 56 + (20 x 7) + 70
A = 56 + 140 + 70
A = 266
