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lions [1.4K]
2 years ago
14

The time taken to complete a journey varies directly as the distance (d) and inversely as the average speed (s).

Mathematics
1 answer:
fomenos2 years ago
5 0

Given that, the time (t) taken to complete a journey varies directly as the distance (d) and inversely as the average speed (s).

Hence, we can set an equation as following:

t = k\frac{d}{s}

Other information is that it takes 3 hours to complete a 280km trip at 80km/h.

So, plug in t = 3, d = 280 and s = 80 in the above equation to get the value of k. Therefore,

3=k \frac{280}{80} [/tex3 = k* 3.5[tex] \frac{3}{3.5} =\frac{k*3.5}{3.5} Divide each sides by 3.5.

k = 0.857142857

So, k = 0.857

Now we need to find the time when d= 546 and s = 65. So, plug in these values in the above equation to get the value of t. Hence,

t = 0.857*\frac{546}{65}

= 0.857 * 8.4

= 7.1988

= 7 hours ( Rounded to nearest integer).

So, it will take 7 hours.

Hope this helps you!

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Step-by-step explanation:

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Every box contains 3 shipping labels.

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3.90 meters.

Step-by-step explanation:

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I did it on paper and looked it up to make sure

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the perimeter will be:
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