The inner and outer radii of a cylindrical pipe are 4cm and 5cm respectively. Find the area of cross section of the pipe.use

two roads of 3 metre Run perpendicular to each other in the middle of a garden as the garden is of length 100 metres and the breadth 80m the road are laid at a cost of rupees 11 per m square and the remaining Garden is levelled at rupees 5 per m square find the total amount spent
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two roads of 3 metre from perpendicular to each other in the middle of a garden as the garden is of length 118 M the roads are lead at a cost of Rs 11 per m square and the remaining Garden is levelled at rupees 5 per m square find the total amount spent
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