2. A path 1 m wide is built inside a square park of side 30 m along its sides. Find the area
of the path. Calculate the cost of constructing the path at the rate of * 70 per m2.
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side of square park (A) = 30m
width of path = 1m
side of inner park (a) = 30-1-1 = 28m
cost of construction = 70 per m^2
Area of path = Area of square park - area of park inside the path
= A^2 - a^2
= 30^2 - 28^2
= 900 - 784
= 116m^2
Cost of construction of path = 70×116
=8120
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