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View Answer
Shortcut:
The area of rectangle is given by:
Area = Length (l) x Breadth (b)
Here, Breadth = b
Length = 4 x Breadth
or, l = 4b
Area of plot = 4b x b
1
/
3
x Area = 1200
So, Area = 1200 x 3 = 3600
Using these values in the shortcut, we get:
Area = l x b
3600 = 4b x b
900 = b2
or, b = 30
So, length is 4b = 4 x 30 = 120
Hence, the Length is 120 metres.
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