1.

A lift descends into an underground floor at the rate of 6 metres per minute. If the descent starts from 10 metres above the ground level, how much time will it take to descend 350 metres?

A.  30 minutes   
B.  50 minutes
C.  1 hour         
D.  1 hour 30 minutes
Answer» D.  1 hour 30 minutes


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