A matchbox 8cm long, 5cm wide and 3cm high is to be covered exactly with coloured paper. How much paper will be required?

 Matchbox is cuboidal in shape 

TO cover all it sides it has to cover its total surfac area

TSA of Cuboid -= 2(lb + bh + hl)

l = 8

b = 5

h = 3

2(8 * 5 + 5 * 3 + 3 * 8)

2(40 + 15 + 24)

2(55 + 24)

2(79)

= 158 cm²

ANs: 158cm²