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Answer:
Width of the Rectangular Tin=8 inch
Length of the Rectangular Tin= 16 inch
Step-by-step explanation:
Let the Width of the Rectangle=W
The length of the piece of tin is twice the width, Length = 2W
Since Squares of 3 inch are cut from all four corners of the rectangle
Length of the box = 2W-(3+3)=(2W-6) inches
Breadth of the Box = W-(3+3)=(W-6) inches
Height = 3 inches
Volume of the box = 60 cubic inches
Now, Volume of a cuboid=lbh
3(2W-6)(W-6)=60
Divide both sides by 3
(2W-6)(W-6)=20
Expanding the brackets
Factorizing
Since the Width cannot be less than 6,
Width of the Rectangular Tin=8 inch
Length= 2 X 8 = 16 inch