an evelator descends into a coal mine at the rate of 5m/min . if the descends starts from 20 m above the ground level, how long will take to reach - 250m ?
manraj3666:
explain how are you solve these question
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Answer:
54 min
Step-by-step explanation:
-250 m means 250 meters below the ground
initial level is 20 m
thus, 250+20=270 m
rate of travel= 5 m/min
therefore distance/rate of travel = time taken
270/5= 54 min
thank you
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