Final answer:
The surface area of Figure B is 125 ft².
Step-by-step explanation:
To find the surface area of Figure B, we need to determine the scale factor between Figure A and Figure B. According to the given information, the scale factor of Figure A to Figure B is 6:3. This means that every measurement in Figure B is half of the corresponding measurement in Figure A.
Since surface area is a two-dimensional quantity, we can conclude that the surface area of Figure B is half of the surface area of Figure A. Therefore, the surface area of Figure B is 250 ft² ÷ 2 = 125 ft².