This answer should be correct but isn’t any ideas?

Answer:
f = 6 cm
g = 8 cm
Step-by-step explanation:
ABCD f*g = 48
ABCE f*g + 1/2 (4*f) = 60
48 + 2f = 60
2f = 12
f = 6
g = 48/6 = 8