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Murrr4er [49]
2 years ago
5

An airplane 30,000 feet above the ground begins descending at the rate of 2000 feet per minute. Assume the plane continues at th

e same rate of descent. How long will it take the plane to reach 12,000 feet above the ground
Mathematics
1 answer:
azamat2 years ago
7 0

Answer:

Step-by-step explanation:

Let the time taken to reach 12,000 feet = x

Distance traveled in 1 minute = 2000 ft

Distance traveled in 'x' minute = 2000 * x = 2000x

30,000 - 2000x = 12000

Add 2000x to both sides

30,000 = 12000 + 2000x

Now subtract 12,000 from both sides

30000 - 12 000 = 2000x

2000x =  18 000

Divide both sides  by 2000

x = 18000/2000

x = 9 minutes

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