Question

Sean read

Answer 1

Answer:

$3\frac{3}{4}$ hours.

Step-by-step explanation:

Sean read $\frac{1}{5}$ of a book in $1\frac{1}{2}$ hours.

We are asked to determine the time that Sean requires to read $\frac{1}{2}$ of this book.

If the rate of reading the book is assumed to be constant, then we can use the unitary method to find the answer.

Now, Sean reads $\frac{1}{5}$ of a book in $\frac{3}{2}$ hours.

So, Sean reads the total of the book in $\frac{3}{2} \div \frac{1}{5} = \frac{15}{2}$ hours.  

Hence, Sean reads  $\frac{1}{2}$ of this book in $\frac{15}{2} \times \frac{1}{2} = \frac{15}{4} = 3\frac{3}{4}$ hours. (Answer)