the surface area of traingular is pH+2B
then we have to do Area of the Base
which is 1/2×2×3 =3
then we find the area of rectangular 10×4=40
then we do another area which is 10×4=40
then we add first area and second area which is 40+3=43×2=86
now we add 86+40
now we find
Total surface area=86+40=126
I hope it's correct