a submarine starts moving down in water at the rate of 6 meter per minute. After sometime it reaches a depth of 60 meter. How will this distance be represented ? how much time will the submarine take to reach this level ?
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A submarine move at the speed of -20m per minute that means it submerge 20m below sea in 1 min. time= 7 minutes. distance submerged is -140 m.
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