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erik [133]
3 years ago
6

Jacob copies 30% of a document. He copies 8 pages. Write the number of pages in thedocument.​

Mathematics
2 answers:
lana66690 [7]3 years ago
5 0

Answer:

27

Step-by-step explanation:

<h2><u>Number of documents</u></h2>

jacob copies 30% of a document which is 8 pages

we can solve this using cross multiplication

30 %       :        8

100%      :         x

30%x = 100%*8

30% x = 8

x = 8/ 30%

x = 26.667

to 2sf

<h3><u>number of pages in the documents 27 </u></h3>

<u />

Vlada [557]3 years ago
5 0
There are 27 pages in the doc
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If it takes 6 hours for a plane to travel 720km with a tail wind and 8 hours to make the return trip with a head wind. Find the
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The speed of wind and plane are 105 kmph and 15 kmph respectively.

<u>Solution:</u>

Given, it takes 6 hours for a plane to travel 720 km with a tail wind and 8 hours to make the return trip with a head wind.  

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Now, let the speed wind be "a" and speed of aeroplane be "b"

And, we know that, distance = speed x time.

\text { Now, at tail wind } \rightarrow 720=(a+b) \times 6 \rightarrow a+b=\frac{720}{6} \rightarrow a+b=120 \rightarrow(1)

Now at head wind → 720=(a-b) \times 8 \rightarrow a-b=\frac{720}{8} \rightarrow a-b=90 \rightarrow(2)

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3 years ago
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Have a good one

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