Answer:
The total number of feet in all the boards is 90 and 5/6 feet
Step-by-step explanation:
First, it is necessary to transform the mixed number into a fraction. This can be made following the next rule:
So, the number 8 and three fourth feet is equal to:
That means that we two boards that are 35/3 feet. So, multiplying 2 by 35/3 we get the total feets for the first type of board. That is:
At the same way, we can calculate the total number of feet for the second and third type of board as:
- Four boards that are 13 and five eighths feet:
- Two boards that are 6 one half feet:
Finally, to find the total number of feet in all the boards, we need to sum the total number of feet for every type as:
Converting this number to a mixed number we get:
Because, when we divide 545 by 6, we get 90 as a quotient, 5 is the remainder and 6 is the divisor.