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# In 15 minutes, Jyoti can read p pages of her economics book. How many

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Re: In 15 minutes, Jyoti can read p pages of her economics book. How many [#permalink]
Bunuel wrote:
In 15 minutes, Jyoti can read p pages of her economics book. How many minutes will it take her to read r pages of her marketing book, if she reads both books at the same rate?

A. r/(15p)

B. 15r/p

C. 15/(rp)

D. 15p/r

E. p/(15r)

The rate of Jyoti is p/15, so it will take her r/(p/15) = 15r/p minutes to read r pages from her marketing book.