The Harappan civilisation: its main sites, planned cities, the Great Bath, the Lothal dockyard, Dholavira’s reservoirs, seals, crafts and trade.
| Great Bath | Mohenjo-daro |
| Dockyard | Lothal (Gujarat) |
| Water reservoirs | Dholavira (Gujarat) |
| One of the largest sites | Rakhigarhi (Haryana) |
| Brick ratio | length : breadth : height = 4 : 2 : 1 |
| Height of the civilisation | about 4,500 years ago |
| Volume of a tank | length × breadth × depth |
A Dholavira reservoir is 75 m × 27 m × 6 m. (a) How many cubic metres of water can it hold? (b) If the town used 1000 cubic metres a day, how many full days would it last? (c) Why did Dholavira need reservoirs?
Working: 75 × 27 × 6; ÷ 1000
Answer: (a) 12,150 cubic metres (b) 12 days (c) It was in a dry region, so rainwater had to be stored.