Please tell me who are intelligent in math integer An an elevator descends into a mine shaft at the rate of 9m/min. how long will it take to reach -150m.
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Please tell me who are intelligent in math integer An an elevator descends into a mine shaft at the rate of 9m/min. how long will it take to reach -150m.
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Answer:
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Step-by-step explanation:
If the descent starts from 20 m above the ground level how long will it take to reach -250 m?
The distance to be descended by the elevator = (-250) - (+20) = - 270 m
rate = begin mathsize 16px style fraction numerator distance space over denominator time end fraction
end style
- 9 = (-270) ÷ x
Therefore x = (-270) ÷ (-9)= 30 minutes