A hollow square shaped tube open at both ends is made of iron. The internal square is of 5 cm and the length of the tube is 8 cm. There are 192 cm^3 of iron in this cube. Find its thickness.
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the volume of its interior=5×5×5=125cm^3
so,
x-125=192(x is the total volume
so,
x-125=192(x is the total volume
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