The answer that best describes the rhetorical strategy that Henry uses here is D. rhetorical question. Rhetorical questions are those that do not necessarily demand an answer - the answer is either obvious so it doesn't have to be stated, or there is no reason to say it.
However, if you need more than one option, I'd also choose interrogative statement, given that this strategy involves the use of questions, which fall under the category of interrogative sentences.
Answer:
get more workers and double production speed
There are several information's already given in the question. Based on those given information's, the answer can be easily deduced.
Since weight is inversely proportional to length, so
Weight = k/Length
k = weight * length
= 410 * 2
= 820
Then
Weight that a 1 m beam can support = 820/1
= 820 kg
I hope that the procedure is clear enough for you to understand.
