Question

A rectangular sheet measuring 80cm and 50cm is 2mm thick and is made of metal whose density is 2.5g/cm cubed.A square of side 5cm is removed from each corner of the rectangle & the remaining part folded to form an open cuboid.
Calculate
a)The area of metal that forms the
cuboid??
b)Mass of the empty cuboid in kg???
cuboid??

Answer 1

remaining area
= 80*50-4*(5*5)
=400-100
= 300 sq cm

Mass = density*volume
Density of metal = 2.5 g/cm³
Volume=300 sq cm *2mm
=300*0.2 cm³
=60 cm³
So mass of open box?

Answer 2

1950