Answer
a. $1790 \ m^2.$
b. $2150 \ m^2.$
Work Step by Step
a. The lateral surfaces are given by
$$ 2\times 10\times 32+2\times 32\times 18= 1792\ m^2\approx1790 \ m^2.$$
b. The total surface area is given by
$$ 1790 \ m^2+2\times10\times18\ m^2 =2150 \ m^2.$$
