Bill has to type a paper that is [tex]$p$[/tex] pages long, with each page containing [tex]$w$[/tex] words. If Bill types an average of [tex][tex]$x$[/tex][/tex] words per minute, how many hours will it take him to finish the paper?

(A) [tex]60 w p x[/tex]
(B) [tex]\frac{w x}{60 p}[/tex]
(C) [tex]\frac{w p x}{60}[/tex]
(D) [tex]\frac{w p}{60 x}[/tex]



Answer :

To determine how many hours it will take Bill to type the paper, we need to follow a step-by-step approach:

1. Calculate the total number of words in the paper:
The paper is [tex]\( p \)[/tex] pages long, and each page contains [tex]\( w \)[/tex] words. Therefore, the total number of words [tex]\( T \)[/tex] in the paper is:
[tex]\[ T = p \times w \][/tex]

2. Calculate the number of minutes needed to type all the words:
Bill types [tex]\( x \)[/tex] words per minute. To find out how many minutes [tex]\( M \)[/tex] it would take Bill to type all [tex]\( T \)[/tex] words, we use the formula:
[tex]\[ M = \frac{T}{x} = \frac{p \times w}{x} \][/tex]

3. Convert the time from minutes to hours:
There are 60 minutes in an hour. To convert the time from minutes to hours, we divide the number of minutes by 60. The time [tex]\( H \)[/tex] in hours is given by:
[tex]\[ H = \frac{M}{60} = \frac{\frac{p \times w}{x}}{60} = \frac{p \times w}{60 \times x} \][/tex]

So, the number of hours it will take Bill to finish typing the paper is:
[tex]\[ H = \frac{p \times w}{60 \times x} \][/tex]

Thus, the answer is:
(D) [tex]\(\frac{w p}{60 x}\)[/tex]