Question

If you read 8 pages in a day, how many days will it take you to read 120 pages?

Answer 1

Hint: We first try to find the number of days it will take to read 1 page using a unitary method. We don’t need to convert the units. Then we find the number of days it will take to read 120 pages by multiplying 120 with the unitary value.

Complete step-by-step solution
8 pages can be read in a day. We need to find the number of days it will take to read 120 pages.
We are going to use a unitary method to find a solution to the problem.
We first find the time it will take to read 1 page.
8 pages can be read in 1 day which means 1 page can be read in $\dfrac{1}{8}$ day.
Now to find the number of days it will take to read 120 pages; we will multiply 120 with $\dfrac{1}{8}$.
So, the number of days will be $120\times \dfrac{1}{8}=\dfrac{120}{8}=15$.
Therefore, it will take 15 days to read 120 pages.

Note: We also can use variables to find the solution. We assume that we need x days to read 120 pages. Now we can read 1 page in $\dfrac{1}{8}$ day. So, for 120 pages it takes x days. So, we equate $\dfrac{x}{120}=\dfrac{1}{8}$ which gives us $x=\dfrac{120}{8}=15$.