Question

Emma is building a wall around her garden. It has taken 45 minutes,and she is 75% done. What is the total time it will take Emma to finish building her wall?

Answer 1

Hey there,
It take 45 min to complete 75% of the wall
1% = 45 / 75
= 0.6
100 % = 0.6 x 100
= 60 min
It takes her 60 mins or 1 hour to finish building the wall.

Hope this helps :))

~Top♥

Answer 2

The answer is 60 min.

Explanation:

In order to determine the total time, we have to know about direct proportionality.

In math, two variables are said to be in a relation of direct proportionality if one variable increases, the other will increase too and the rate of both is a constant. The value of this constant is called the coefficient of proportionality.

In this case, if emma spends more time in the wall, she will build more wall.

So the constant is:

`(time)/(percentage)=k\\(45)/(75)=k\\0.6=k`

Now, applying this constant to a 100%:

T=total time

`(T)/(100)=k=0.6\\T=100*0.6\\T=60`

Finally, the total time is 60 min.