Answer: The weight of 30 Sunday newspaper is 27 pounds.
Step-by-step explanation: Given that 20 Sunday newspaper weigh 18 pounds.
We are to find the weight of 30 Sunday newspaper.
We will be using the Unitary method to solve the given problem.
We have
Weight of 20 Sunday newspaper = 18 pounds.
So, weight of 1 Sunday newspaper will be

Therefore, the weight of 30 Sunday newspaper is given by

Thus, the weight of 30 Sunday newspaper is 27 pounds.