The width: about 13 to 14 metres.
Now measure one of the two outer walls of the house block along its base.
It comes to roughly 2.8 times the length of the scale bar.
2.8 × 5 m = about 14 metres
The other wall measures a little less — about 13 metres.
So the house covers roughly 14 m × 13 m ≈ 180 square metres on the ground floor.
Compared with your classroom. A typical classroom is about 7 to 8 metres long and 6 metres wide. So one wall of this Mohenjo-daro house is about twice the length of your classroom, and its ground floor alone would hold roughly four classrooms — and there was another floor above it.
The staircases: at least three can be made out. A staircase is drawn as a run of close parallel lines — the treads — on a sloping surface. Looking for that pattern, you can find:
- one in the front-left part of the house, rising in a narrow space beside a room;
- one at the front-centre, rising out of the paved courtyard into a room;
- one at the back-left, near the passage where the plan steps up towards the higher block.
A fourth flight can be argued for on the right-hand side, so a count of three or four is defensible — say which ones you found and where, rather than just giving a number.
What the ground floor was for. The text says that ‘while the servants lived downstairs, the owners probably lived upstairs, where they would be less exposed to the dust and noise from the streets around’. That tells you what belongs on each level. Downstairs would hold:
- the entrance and gate room, where visitors and deliveries were received;
- the service rooms — kitchen, grinding and cooking area, and the servants’ own rooms;
- storerooms for grain, oil and large water jars, which are heavy and were best kept at ground level;
- the bathing area and drain — the chapter notes that almost every Mohenjo-daro home had one, and used water was taken out through the city’s drains, so it had to be at street level;
- the courtyard itself, for all the work that needs daylight and space — washing, drying, sorting, perhaps a workshop or storage of goods.