Question

A 3cm thick iron open box is made whose external diamentions are 78cm x 54cm x 12cm.Find the weight of the box if its density is 60gm/cm3. *

Answer 1

Answer:

1166.4 kg

Step-by-step explanation:

Thickness of the iron sheet = 3 cmExternal dimensions at the box = 78 cm x 54 cm x 12 cmInternal Dimensions of the box = (78 - 2 × 3) × (54 - 2 × 3) × (12 - 3) = 72 × 48 × 9 Therefore, internal dimensions of the box = 72 m x 48 cm x 9 cmVolume of the iron used in making the box           = External volume of the box - Internal volume           = 78 x 54 x 12 - 72 x 48 x 9          = 50544 - 31104 = 19440 cm3

Weight = Volume x density         = 19440 x 60 gm         = 1166.4 kg

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