Question

A closed wooden box 80 cm long, 65 cm wide and 45 cm high, is made up of wood 2.5 cm thick.
Find (i) the capacity of the box (ii) the weight of the box, if 100 cm of wood weighs 8 grams.
The external dimensions of a wooden box, open at the top are 54 cm by 30 cm by 16 cm. It is made​

Answer 1

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Height of box outside = 45cm

from inside= 45-2.5+2.5

= 45-5

= 40cm

volume= l×b×h

= 75×60×40

= 180000cm^3

Area of cubical box= 80×60×45

= 234000cm^3

Area of wooden box = 234000-180000

= 54000cm^3

Weight of box 8g= 0.008kg

= 54000/100

= 540

= 540×0.008

= 4.32kg