A submarine moved from the water surface at a speed of (-20) m per minute. How far is the submarine from the water surface at the end of 7 minutes?
(Hint: Consider the water surface level as
zero.)
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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.29-Jun-2017
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