How long did the Industrial Revolution last?

From the year of 1760 to 1820 or 1840 (one those could be your answer so.

1820years - 1760years =

60years

or if its the other year (1840)

Then try going with 1840years - 1760years = 80 years

So, either 60 years or 80 years would most likely be your answer! (If that's one of your options)