Answer: 3200 tonnes
Step-by-step explanation:
Rice production in 2001 = 1000 tonnes, which represented a 25% of total food gain in 2001.
Total food grain production in 2001
= 1000 × 100 / 25
= 4000 tonnes
In 2002 production of rice decreased by 4%
= 1000 - 1000 × 4 ÷ 100
= 960 tonnes
Total food grain production in 2002
= 3200 tonnes