Ill give ! ((if more than one person answers))

a) 300

b) 900

Step-by-step explanation:

The length of the rectangle is 5 and the width is 3...

But since the rectangles are connected together, we could just work the problem like this:

5 x 2 = 10

3 x 5 = 15

15 x 2 = 30

The surface area of the shape is 10 x 30 = 300

If the dimensions of the box were tripple, we would need to multiply the surface area by 3:

300 x 3 = 900

For the second question, the answer would be 900

Hope this helped you :-)

step-by-step explanation:

it's 15

4.

step-by-step explanation:

it have the same area.brainliest