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Multistore building has a parking floor at the basement. A lift moves at the rate of 4m per 15 seconds. If the lift starts coming down from the height of

40m then find its position after 3 minutes


For 4m it moves at rate of 15sec i.e., for 4m it moves at a rate of 1/4minutes
then for 1m it moves at rate of 1/16min 
                 for 1m time taken is 1/16min 
                 for x metres time taken is ?
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