Question

plz help me this question 12 problem

Answer 1

Its surface area = 5a^2 sq. units
= 5(1)
= 5 m^2

Answer 2

Area of cubical box with out lid=5×a^2
$= 5 \times {1}^{2} \\ = 5 {m}^{2}$
I hope it helps you.