Question 416835
Let r = the safe ascent rate (30 feet per min.)
We know that rate = distance/time
Distance, d = 165 feet
To get the time required to travel a certain distance, invert the rate and multiply by the distance.
Thus we have t = d/r
Putting in the numbers gives t = 165 feet/(30 feet/min) = 5.5 min.
Ans: 5.5 minutes