Plz show work and solve quick need !

Surface area is just the area of all these 4 triangles plus the rectangle.

First we can find the area of the rectangle.



Half of the length is 28 cm, so the full length must be 28 * 2 = 56 cm.





The base for the left and right triangles are 27. The heights would be the net length minus half the length of the rectangle:



Calculate the area:







We have two of these triangles.



Now do the other two pair of triangles. The bases for them are 28 + 28 = 56 cm. The heights would be the net width minus the width of the rectangle:



Now find the area:







We have two of these triangles.



Add all the areas together: