Question

Anaida finishes her homework in 45 minutes on Sunday. On Saturday, she needs 4 times that amount of time. How much time does she spend on homework on both days together?

Answer 1

Hint: Here, we will find 4 times in 45 minutes. Then, we will convert minutes into hour units using the conversion $\text{60minute=1hour}$ . And then we will add time of both days i.e. Saturday and Sunday we will get total time which is our answer.

Complete step-by-step answer:
Here, we are given that Anaida takes 45 minutes to complete her homework on Sunday. On Saturday, 4 times of that amount of time which we can find as
$\therefore 4\times 45=180\text{minutes}$ ………………….(1)
Now, we know that $\text{60minute=1hour}$ , so we will find out for 180 minutes in an hour using a unitary method. So, we will get as
$\begin{align}
  & \text{60minute=1hour} \\
 & \text{180minutes=?} \\
\end{align}$
On solving this, we will get
$=\dfrac{180\times 1}{60}$
On further simplification, we get
$=3hours$ ……………………..(2)
So, now will we add Sunday time and Saturday time we will get as,
$time=3hours+45\text{minutes}$
Which we can write as 3hours 45 minutes.
Also, we can write it in minutes only, So, we can write it as $180+45=225\text{minutes}$ .
Thus, 225 minutes or 3hours 45 minutes she spends on homework on both days together.

Note: In question it is not asked in which we have to write an answer whether in hours, minutes or seconds. So, if we write answer in seconds then we will get answer as
$\begin{align}
  & 1\text{minutes=60sec} \\
 & 225\text{minutes=?} \\
\end{align}$
On solving, we get $225\times 60=13500\sec $ .
Thus, in all the units the answer will be correct but we will prefer as minutes is given in question, answer should be in minutes only.