A farmer harvests his crop and expresses his harvest in three different ways.
(a) I have harvested 10 quintals of wheat.
(b) I have harvested 10 quintals of wheat today in one acre of land.
(c) I have harvested 10 quintals of wheat in one acre of land, 6 months after sowing. 
Do the above statements mean one and the same thing. If your answer is ‘yes', give reasons. And if your answer is ’no’ explain the meaning of each expression. 

Explanation

Three above statement do not means one and the same thing because :
(i) Statement (a) indicates total productivity of wheat but does not indicate the extent of area.
(ii) Statement (b) indicates productivity of wheat/acre on a specific day.
(iii) Statement (c) indicates productivity of wheat/ acre/specific period.