How many hollow cylindrical wrappers are formed from a paper sheet of dimension 4.4m x 1m. if the radius and height of each hollow cylindrical wrapper are 7 cm and 2 cm respectively.?
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A solid iron rectangular block of dimensions 4.4 m, 2.6 m and 1 m is cast into a hollow cylindrical pipe of internal radius 30 cm and thickness 5 cm. Find the length of the pipe.
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