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111. A rubber cord catapult has cross-sectional area

A rubber cord catapult has cross-sectional area 25mm2 and  initial length of rubber cord is It is stretched to  and then released to project a missile of mass  (Taking  YRUBBER=5×108N/m2) velocity of projected missile is

(a) 20 m/s                             (b) 100 m/s

(c) 250 m/s                           (d) 200 m/s

Answer-c

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