Dorothy types 120 words per minute. How many words does Dorothy type in 1.75 minutes?

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Dorothy types 120 words per minute. How many words does Dorothy type in 1.75 minutes?

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Answer 1 · 2016-08-31T08:03:47

210 words.

Explanation:

Firstly note that $1.75 = 1 \frac{3}{4}$ $1.75=1 3/4$ as a mixed number.

and that $134=74 as an improper fraction.$ $1 3/4=7/4" as an improper fraction."$

$\Rightarrow \frac{120 words}{1 min} = \frac{x words}{\frac{7}{4} min}$ $rArr(120" words")/(1"min")=(x" words")/(7/4"min")$

and $cross-multiplying$ $color(blue)"cross-multiplying"$ gives.

$x=120xx7/4=cancel(120)^(30)xx7/cancel(4)^1=30xx7$

$=210" words"$

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Dorothy types 120 words per minute. How many words does Dorothy type in 1.75 minutes?

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