<span>The four classes were the Brahmins (priestly people), the Kshatriyas (also called Rajanyas, who were rulers, administrators and warriors), the Vaishyas (artisans, merchants, tradesmen and farmers), and Shudras (labouring classes).</span>
Answer:
In order to deposit 100 meters of limestone layer, it will take 6,451,600 years
Explanation:
Given that,
The rate of deposition carbonate sediments is 1.55 cm in 1,000 years
⇒ 1.55 cm = 1,000 years
⇒ 1 cm = 
⇒ 1 cm = 645.16 years
∵ 1 m = 100 cm
∴ 100 m = 100 × 100 cm
⇒ 100 m = 10,000 cm
So, the time it will take for carbonate to deposit 100 m thick layer of limestone will be-
⇒ 10,000 cm (100 meter) = 645.16 × 10,000 years
⇒ 100 meters = 6,451,600 years
Maybe it's dairy farmer, but I'm not sure.