ginadesor851 ginadesor851 26-03-2024 Physics contestada A hollow iron pipe is 21 cm long and its external diameter is 8 cm. If the thickness of the pipe is 1 cm and iron weighs 8g, then the weight of pipe is :A. 3.6 kgB. 36 kgC. 3.696 kgD. 36.9 kg