In sand casting of hollow part of lead, a cylindrical core of diameter 120 mm and height 180 mm is placed inside the mould cavity. The densities of core material and lead are 1600 kg/m and 11300 kg/m respectively. The net force (in N) that tends to lift the core during pouring of molten metal will be

In sand casting of hollow part of lead, a cylindrical core of diameter

1.	In sand casting of hollow part of lead, a cylindrical core of diameter 120 mm and height 180 mm is placed inside the mould cavity. The densities of core material and lead are 1600 kg/m and 11300 kg/m respectively. The net force (in N) that tends to lift the core during pouring of molten metal will be
A.	19.7
B.	64.5
C.	193.7
D.	257.6
Answer» D. 257.6

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