business math
posted by Shadow of me .
How long will it take the farmer to sell all his chickens?
Farmer has 2100 chickens. He sells
10 chickens at the end of the first week,
20 chickens at the end of the second week,
30 chickens at the end of the third week and so on.
Question: How long will it take the farmer to sell all his chickens?

210 weeks