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3 years ago

A kilometre is about 5/8 mile. How many kilometres are in 2 3/4 miles?

Mathematics

1 answer:

Lapatulllka [165]3 years ago

4 0

Answer:

To do this in my head: 60km = 40km+20km

So 40km/8km = 5

40 k is approximately 5x5miles = 25 miles

20k is half that or 12.5 miles

60 is about 25+12.5 miles

or 37.5 miles

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Zepler [3.9K]

Alexis can wash a total of 14 windows in 1 hour

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

Given that Alexis washes $10\frac{1}{2}$ windows in $\frac{3}{4}$ hours

<u><em>To find: </em></u>number of windows washed in one hour

To simplify the calculations we will convert the given mixed fraction to improper fraction

$\begin{array}{l}{=10 \frac{1}{2}} \\\\ {=\frac{2 \times 10+1}{2}} \\\\ {=\frac{21}{2}=10.5}\end{array}$

Hence, to wash 10.5 windows, Alexis takes 0.75 hours

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"n" windows ⇒ 1 hour

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