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Let x = width

3x - 6 = length

Perimeter is 2(l + w)

2(x + 3x - 6)

2x + 6x - 12

8x - 12 = 148

8x = 160

x = 20

3x - 6 = 54

Rectangle is 20 x 54

Check it.

2(20 + 54)

2 x 74 = 148

It checks.

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Q: The length of rectangle is 6 metre less than the three time its breadth if its perimeter is 148 metre find the dimensions of the rectangle?
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