Verified answer

Step-by-step explanation:

we know 1 hour =60 min so 60min x 5metres=300 meters.. but the elevator began to descend from 15 meters above so, 300-15="285metres." and its position after 45 mins is 45metres x 5 mins=225 meters

after 1hour=5×60=300. It's position will be=15-300=-285=285m below the ground.