Answer: 58 yards of twine is needed to wrap 29 cartons .
Step-by-step explanation:
Length of twine to wrap each carton = 1 yard 2 feet 4 inches
As we know that

And

So, we have

Number of cartons he has to pack = 29
Now, length of twine he will needed for 29 cartons is given by

As we need to change it into larger units i.e. yards
So,

Hence, 58 yards of twine is needed to wrap 29 cartons .