The two solids are similar and the ratio between the lengths of their edges is 2: 9. what is the ratio of their surface areas?

can you also me with the 2nd attachment, the question is on the picture?

we know that

If two solids are similar

then

the ratio of their corresponding sides are equal and is called the scale factor

Part 1)

In this problem

The ratio of their surface areas is equal to the scale factor squared

therefore

the answer is the option A

Part 2)

In this problem

The ratio of their surface areas is equal to the scale factor squared

therefore

the answer is the option D

it is contrapositive

i could not see the question too well so check yourself again too . this is because i want you to get it correct.