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lawyer [7]
3 years ago
11

33.63 miles in 3 hours what is the speed in miles per hour

Mathematics
2 answers:
GrogVix [38]3 years ago
8 0
11.21 miles because first of all you need to divide 33.63 by 3 plus is you do 11.21x3= 33.63 this expression is the inverse operation so this will be to check your work I hope this was helpful :)
Sveta_85 [38]3 years ago
6 0

11.21 miles because you divide 33.63 by 3 and you'll get your answer.

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It takes 3 hours to paddle a kayak 12 miles downstream and 4 hours for the return trip upstream. Find the rate of the kayak in s
Furkat [3]

The rate of the kayak in still water is 3.5 mph

<h3><u>Solution:</u></h3>

Given that It takes 3 hours to paddle a kayak 12 miles downstream

Distance covered in downstream = 12 miles

Time taken to cover downstream = 3 hours

Also given that it takes 4 hours for the return trip upstream

Distance covered in upstream = 12 miles

Time taken to cover upstream = 4 hours

<em><u>Formula to remember:</u></em>

If the speed of a boat in still water is u km/hr and the speed of the stream is v km/hr, then: Speed downstream = (u + v) km/hr and Speed upstream = (u - v) km/hr

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And The speed of current = y mph

For downstream:

Speed downstream = x + y

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\frac{distance}{time} = x + y

x + y = \frac{12}{3}

x + y = 4  ------ eqn 1

<em><u>For upstream:</u></em>

Speed upstream = x - y

\frac{12}{4} = x - y

x - y = 3 -------- eqn 2

Now let us eqn 1 and eqn 2

Add eqn 1 and eqn 2

x + y + x - y = 4 + 3

2x = 7

x = 3.5

speed of Kayak in still water = x mph  = 3.5 mph

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olga_2 [115]
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That is (5,350 / $ 20,000) * 100 = 26.75 %

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