Question

A closed box measures 66cm, 36cm and 21 cm from outside. If its walls are made of metal sheet, 0.5cm thick find the volume of metal sheet and weight of the box if 1cm³of metal weights 3.6g​

Answer 1

Step-by-step explanation:

given dimensions of box are(from outside)

(66×36×21)cubic cm

so volume=49896cubic cm

it's given thickness is 0.5 so dimension of inner box would be

(66-1)×(36-1)×(21-1)

=65×35×20

=45500 cubic cm

Now volume of metal sheet is

outer volume - inner volume

49896-45500

=4396cubic cm

Now weight of sheet is

given that weight of 1cm³ is equals to 3.6 g

so weight of 4396cm³ metal is=

4396×3.6

=15825.6g or 15.825 kg

hope this helps