on which line is there a spelling mistake. 1/ reported to the HSE or local authority immediately. A major injury is

2/ construction industry. About one hundred and forty are fatal. This is

3/ hospital treatment lasting more than twenty-four hours.

http://www.grammarbook.com/numbers/numbers.asp

See Rule 7. Let me know what you think.

In the given sentences, there is a spelling mistake in line 2. The correct spelling should be:

2/ construction industry. About one hundred and forty are fatal. This is

The correct sentence will be: "About one hundred and forty are fatal."

To identify the line with a spelling mistake, you will need to carefully review each line and check for any words that might be misspelled. Here's a breakdown of each line:

Line 1: "reported" and "immediately" seem to be spelled correctly. There doesn't appear to be any spelling mistake in this line.

Line 2: "construction" seems to be spelled correctly. However, the word "fatal" is not a spelling mistake, but it should be "fatalities" to match the plural subject "about one hundred and forty."

Line 3: "hospital" and "treatment" appear to be spelled correctly. "lasting" and "more" are also spelled correctly. "twenty-four" and "hours" seem to be spelled correctly as well.

In conclusion, there is no specific line with a spelling mistake. However, there is an error in line 2 where "fatal" should be changed to "fatalities" for proper subject-verb agreement.