เดเดพเตพเดชเตเดดเตโเดธเตบ เดธเตโเดเตเดฏเตเดจเดค เดเตเดฃเดพเดเตเดเด เดเดฃเตเดเตเดคเตเดคเตเด
เดตเดฟเดฒเดเตพ | 6 | 12 | 18 | 24 | 30 | 36 | 42 |
f | 4 | 7 | 9 | 18 | 15 | 10 | 3 |
A hollow iron cylinder of inner radius 15 cm its outer radius is 16 cm and height of the cylindr is 63cm how much iron is required to construct the hollow circular cylinder?
A hollow iron pipe is 21 cm long and its exterior diameter is 8 cm. If the thickness of the pipe is 1 cm and iron weighs 8 g/cm3, then the weight of the pipe is