In the series 5442673314884743581,the number of 4s that are completely divisible by the number on their right but not divisible by the number on their left is
Radius of cross section of a solid right circular cylindrical rod is 3.2 dm. The rod is melted and 44 equal solid cubes of side 8 cm are formed. The length of the rod is (Take Π = 22/7)