Answer:
x = 12
Step-by-step explanation:
From the similar figures given in the picture,
(Figure A ~ Figure B)
Corresponding sides of the figures will be proportional.
By this property of the similarity,
[tex]\frac{x}{10}= \frac{30}{25}[/tex]
x = [tex]\frac{300}{25}[/tex]
x = 12
