Question

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Answer 1

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Refer to attachment

Answer 2

2. )Lateral surface area of cube = 400cm^2

Lateral surfave area of cube :

$4 {a}^{2}$

$- > 400 = 4 {a}^{2}$

$- > {a}^{2} = \frac{400}{4}$

$- > {a}^{2} = 100$

$- > a = \sqrt{100}$

$- > a = 10 \: cm$

3.) Breadth = 10m

height = 8m

Lateral surface area = 360m

Lateral surface area of cuboid :

$2h(l + b)$

$- > 360 = 2 \times 8(l + 10)$

$- > \frac{360}{2 \times 8} = l + 10$

$- > 22.5 = l + 10$

$- > l = 22.5 - 10$

$- > l = 12.5$

I hope it helps u kenny ^_^♡