An elevator is 20m below the ground level and it ascends at the rate of 5m/min. Find the time taken by it to reach 45m above the ground level.
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Height of the elevator below the ground level = -25 m
Rate of ascending = 5m/min
The elevator has to reach 50 m above the ground level.
That means, the elevator has to go up and hence the distance covered by it will be positive.
Thus, total distance that elevator has to cover =
50 + 25 75 m 75 + 5 = 15 min
Hence, time taken by elevator to cover 75 m = 75 + 5 = 15 min
Hope it helps!
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