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# maths

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It takes Sian 9 days to read a 432 page book.  How long will it take her to read a 720 page book at the same rate?

i need help

Mar 5, 2021

#1
+236
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432/9 = 48

720/48 = 15

15 days

Mar 5, 2021
#2
+149
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Let x number of  how many time it take to read.

$$\frac{9}{432}=\frac{x}{720}$$

$$48x=720$$

$$x=15$$

Mar 5, 2021
#3
+34465
+2

9 days / 432 pages    *   720 pages   =  15 days

( see how the 'pages' cancel' out .....and you are left with 'days' as units?)

Mar 5, 2021