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2 years ago

Maria's luggage travels 36 m in 3 minutes. What is the speed of the conveyer belt in kilometers per hour?

Mathematics

1 answer:

creativ13 [48]2 years ago

6 0

Answer:

0.72 km per hour

Step-by-step explanation:

First, find the speed in meters per hour. Create a proportion where x is this speed:

$\frac{36}{3}$ = $\frac{x}{60}$

3x = 2160

x = 720

So, the speed is 720 meters per hour. Convert this to kilometers per hour by dividing 720 by 1000, since there are 1000 meters in a kilometer:

720/1000

= 0.72

So, the speed of the conveyer belt is 0.72 km per hour

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Because the length is always positive the only point we take is $x=30$ . We thus test the intervals $(0, 30)$ and $(30, \infty)$

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