Answer:
The total area is 380 cm².
We can set up an equation as follows:
(
�
×
10
)
+
(
20
×
15
)
=
380
(x×10)+(20×15)=380
10
�
+
300
=
380
10x+300=380
Now, let's solve for 'x':
10
�
=
380
−
300
10x=380−300
10
�
=
80
10x=80
�
=
80
10
x=
10
80
�
=
8
x=8
So, the value of 'x' is 8 cm.
Step-by-step explanation:
