(49+49+56+62+60+50+59) / 7 = 55
Answer:
Surface area of the box is 
Step-by-step explanation:
The box is in the shape of a cuboid:
Surface area of the cuboid = 2(L*W+W*H+H*L)
Length(L)=20.1 m
Width(W)=6.8 m
Height(H)=7.4 m
Surface area:

The surface area of the box is 