No, 3 hours is equal to 180 minutes.
To understand how the present affects the future
A division of labor occurred when people started producing a surplus of food because it was no longer necessary to use all of the labor force to subsist off of agricultural goods. Once a society or community can produce enough to survive and eat the labor force will begin to work in other industries creating a division of labor this could include making textiles, building homes, or any other number of economic activities.
Children Had to Work
many people lost their Jobs because of new machines
Therefore they Had to move to the big cities to find work in the new factories where they Had to do monotonous and Boring Work(e.g. Control the machines)
This Work was badly paid
The cities were dirty and the Apartments often very small
But
New machines that Made Life easier ( staem engines)