To Find: The length of the tied ropes. A 3.4 m rope is attached to

Step 1
Add 3.4 m and 5.8 m
On adding 3.4 m and 5.8 m, the result is 9.2 m
Now, 8 cm of length is lost to form the knot
Hence, subtract 8 cm from 9.2 m
The relation between m and cm is ${\displaystyle 1m=100cm}$
Hence, 8 cm is equal to 0.08 m
Thus, subtract 0.08 m from 9.2 m
${\displaystyle 9.2m=0.08m}$
${\displaystyle =9.12m}$
Therefore, the length of tied ropes is 9.12 m