the dimensions of an open box are 50 cm , 40cm and 23 cm .its thickness is 3 cm. if 1 cubic cm of metal used in the box weighs 0.5 gms , find the weight of the box

Volume of metal used
= Extrenal volume - internal volume
=(50 * 40 * 23) - (44 * 34 * 20)
=46000-29920
=16080 cm3

Weight of the box in grams = 16080*0.5=8040gm
Weight of the box in kg = 8040/1000= 8.04 kg

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