D. 400
Feedback Given length of iron rod =7 mts and and diameter of rod = 2 cms
=> r = 1/100 mts
Therefore, Volume of one rod = πr^2h cu. m = (22/7×[1100]^2× 7)cu. m
= 11/5000 cu. m
Given volume of iron = 0.88 cu. m
Therefore, Number of rods = (0.88×5000/11) = 400.