Answers

2015-08-17T14:43:19+08:00
Assuming that the density of cast iron is (7.2 x 10^3 kg/m^3)(1 m/100 cm)^3 = 0.0072 kg/cm^3, we solve: (0.0072 kg/cm^3)(30 cm)(90 cm)(x) = 55 kg --> x = 2.83 cm
0