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Cerrena [4.2K]
3 years ago
10

How many 4/5's are in 1

Mathematics
1 answer:
jolli1 [7]3 years ago
8 0

Answer: 5/4

Step-by-step explanation:

To get the number of groups of 4/5 are in 1, we divide 1 by 4/5. This will give:

= 1 ÷ 4/5

= 1 × 5/4

= 5/4

<h3>There are 5/4 groups of 4/5 in 1.</h3>
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Determine the average speed of the current in a river if a boat moves at 20 miles/hour in still water and takes 3 hours to trave
Taya2010 [7]

The speed of the current in a river is 6 miles per hour

<em><u>Solution:</u></em>

Given that,

Speed of boat in still water = 20 miles per hour

Time taken = 3 hours

Distance downstream = 78 miles

To find: Speed of current

<em><u>If the speed of a boat in still water is u km/hr and the speed of the stream is v km/hr, then:  </u></em>

Speed downstream = (u + v) km/hr

Speed upstream = (u - v) km/hr

<em><u>Therefore, speed downstream is given as:</u></em>

\text{ speed downstream } = \frac{distance}{time} = \frac{78}{3}\\\\\text{ speed downstream } = 26 \text{ miles per hour }

We know that,

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26 = 20 + v

v = 26 - 20

v = 6 miles per hour

Thus speed of the current in a river is 6 miles per hour

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3 years ago
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3 years ago
Allen's miniature train travels at a rate of 20 meters in 2 minutes. At this rate, how far will the train travel in 10 minutes?
Sav [38]

Answer:

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Step-by-step explanation:

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Please help me with this math problem.
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