Question

How many cubic centimeters of iron are there in an open box whose external dimensions are 36 cm 25 cm and 16.5 cm.The iron being 1.5 cm thick throughout? If 1 cm^3 weighs 15gms, find the weight of empty box in kg.

Answer 1

External volume (without counting hollow part) = 36*25*16.5 = 14850 cc

Internal dimensions of box:
=> 36-2(1.5) = 33cm
=> 25-2(1.5) = 22cm
=> 16.5-2(1.5) = 13.5cm
Volume of hollow part in box = 33*22*13.5 = 9801 cc

Box is open, therefore top part must be removed.
Volume of top part = 36*25*1.5 = 1350 cc

Therefore, volume of box = 14850-9801-1350 = 3699 cc

Weight of box = 3699*15 = 55485g = 55.485 kg

Answer 2

hey
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here cubic centimetre means we have to find the volume

after finding volume of iron box that is open box we will proceed by the given data

internal volume and external volume has been founded

any doubts ask me

refer to the attachment

hope helped
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