2 meters long 1 meter 5 wide 3 meters high room, how many stairs to build to the 2nd floor?
Your room size is very small ah, it is recommended to use ladder.
Look at the height of the pedal, and the angle of the stairs, 45 degrees of the gradient ladder, pedal height difference of 0.2 meters, then use the 15 steps.
Your room size is very small ah, it is recommended to use ladder.
