A grassy plot is 80\ m\ xx60\ mdot two c...

A grassy plot is `80\ m\ xx60\ mdot` two cross paths each 4 m wide are constructed at right angles through the centre of the field, such that each path is parallel to one of the sides of the rectangles. Find the total area used path. Also, find the cost of gravelling them at Rs. 5 per square metre.

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