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3 years ago

12

To find the population of a city next year, we multiply its current population by 0.987. By what percent does the population dec

rease per year?

1 answer:

ololo11 [35]3 years ago

3 0

Answer:

$1.3\%$

Step-by-step explanation:

$1 - 0.987 = 0.013$

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3 years ago

A train 100 m long crosses a pole in 5 seconds.Find the speed of the train in kilometre per hour.

In-s [12.5K]

Answer:

$\sf72 km/h$

Step-by-step explanation:

Distance covered by the train in crossing the pole = 100 m.

$\sf Time \: taken=5 \: seconds$

$\sf \: Speed \: of \: the \: train = \frac{Distance }{Time}$

$\sf = \frac{100}{5} \: m/s$

$\sf \: = 20 \: m/s$

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3 years ago