Thousand solid metallic spheres of diameter 6 cm are melted and recast into a new solid sphere. The diameter of the new sphere (in cm ) is
30
90
45
45
1980
1981
1983
1983
B.
1981
Sum of production of food grains in 1982 and 1983 = 20 +15 = 35
Sum of production of food grains in 1981 = 35
500 tonnes
1000 tonnes
5000 tonnes
5000 tonnes
15%
30%
50%
50%
1980 and 1981
1982 and 1983
1984 and 1985
1984 and 1985