ANSWER
[tex]T.S.A=1960m^2[/tex]
EXPLANATION
The diagram represents the net of a rectangular prism.
The dimensions are,
[tex]l=42m[/tex]
[tex]w = 14m[/tex]
and
[tex]h = 7m[/tex]
The total surface area of a rectangular prism is given by:
[tex]T.S.A=2(lw + lh + wh)[/tex]
We substitute the values to obtain,
[tex]T.S.A=2(42 \times 14 + 42 \times 7 + 14 \times 7)[/tex]
[tex]T.S.A=2(980)m^2[/tex]
[tex]T.S.A=1960m^2[/tex]
