An elevator goes down at the rate of 5 m per minute. If it starts going down from a height of 20 m above the ground level, find the time taken by the elevator to reach 255 m below the ground level.
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Step-by-step explanation:
given rate of elevator is 5m per min
total ht =255+20 m =275m
time = total ht/rate
- =275/5
- 55 min
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