Answer
It will take Rich around 54 minutes to read 30 pages.
Work Step by Step
Let $x$ = the time it will take Rich to read 30 pages.
Rich spends 25 minutes to read 14 pages.
Rich spends $x$ minutes to read 30 pages.
Assuming Rich reads at a constant rate, then ratio and proportion can be sude to solve this problem.
Setting up the ratio and proportion gives
$$\dfrac{25}{14} = \dfrac{x}{30}$$
Cross-multiply to obtain:
$$14(x) = 30(25)
\\14x=750
\\\dfrac{14x}{14} = \dfrac{750}{14}
\\x=\dfrac{375}{7}
\\x=53.57142857
\\x \approx 54$$
Thus, it will take Rich around 54 minutes to read 30 pages.
