Number of links in a 30 m metric chain is ....................
🔗 Understanding Metric Chains
Metric chains are standardized instruments used in surveying for measuring horizontal distances. The key design feature, as per Indian Standard I.S. 1492–1970, is that each individual link has a fixed length of 20 cm (0.2 meters).
🔬 Detailed Calculation
To find the total number of links in a chain of a given length, you simply divide the total length by the length of a single link.
- Total Chain Length: 30 meters
- Length of One Link: 20 cm (which is 0.2 meters)
Calculation:
Number of Links = Total Length / Length per Link
Number of Links = 30 m / 0.2 m/link = 150 links
📊 Summary: Standard Metric Chains
This principle applies to all standard metric chain lengths:
| Total Chain Length | Calculation | Number of Links |
|---|---|---|
| 5 m | 5 m / 0.2 m | 25 links |
| 10 m | 10 m / 0.2 m | 50 links |
| 20 m | 20 m / 0.2 m | 100 links |
| 30 m | 30 m / 0.2 m | 150 links |
💡 Key Takeaway
The most important value to remember for metric chains is the standard link length: 20 cm. Once you know this, you can easily calculate the number of links for any given metric chain length.