Directions (1 - 4): The graph shows the production of food grains of a country in different. Study the graph and answer the questions.
1. The two consecutive years in which rate of change of production of food grains is minimum are. A. 1980 and 1981 B. 1982 and 1983 C. 1984 and 1985 D. 1983 and 1984 Answer & Solution Discuss in Board Answer & Solution Answer: Option A Solution: From graph it is clear two consecutive years in which rate of change is minimum are 1980 and 1981.
2. The difference of the production of food grains for the year 1981 and 1985 is: A. 500 tonnes B. 1000 tonnes C. 5000 tonnes D. 10000 tonnes Answer & Solution Discuss in Board Answer & Solution Answer: Option C Solution: Difference of production of 1981 and 1985 = 35 - 30 = 5 × 1000 = 5000 tonnes
3. The percentage increase in production from 1984 to 1985 was. A. 150% B. 120% C. 95% D. 100% Answer & Solution Discuss in Board Answer & Solution Answer: Option D Solution: $$\eqalign{ & \text{% increase} \cr & = \frac{30 - 15}{15} \times 100 \cr & = \frac{15}{15} \times 100 \cr & = 100\% \cr} $$
4. The sum of the production of food grains in the year 1982 and 1984 is equal to that in the year: A. 1980 B. 1981 C. 1983 D. 1985 Answer & Solution Discuss in Board Answer & Solution Answer: Option B Solution: From the graph: Sum of 1982 and 1984 = 20 + 15 = 35 Which is equal to the production of 1981
