A plate on square base made of brass is of length x cm and

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A plate on square base made of brass is of length x cm and width 1 mm. The plate weighs 4725 gm. If 1 cubic cm of brass weighs 8.4 gram, then the value of x is :

Volume of the plate of square base = Area of base × height

= x² ×	1	=	x²	cu.cm.
	10		10

According to the question,

	x²	× 8.4 = 4725
	10

⇒ x² =	4725 × 10	= 5625
	8.4

⇒ x = √5625 = 75 cm.