25. An elevator descends into a mine shaft at the rate of 5 metre per minute. (a) What will be its position after 1 hour? (b) If it begins to descend from 15 m above the ground, what will be its position after 45 minutes?
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Step-by-step explanation:
An elevator descends into mine shaft at the rate of 5 meter per minute. so for 1 min elevator descends 5metres. we know 1 hour =60 min so 60min x 5metres=300 meters..
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