Видео с ютуба Hopper Capacity Calculation
VOLUME & CAPACITY CALCULATION/CYLINDER/FRUSTUM OF CONE/CIRCULAR HOPPER/CYLINDER WITH FRUSTUM OF CONE
TREMIE HOPPER / VOLUME & CAPACITY CALCULATION FOR TREMIE HOPPER / RECTANGULAR PRISM / BIN / SILO /
VOLUME & CAPACITY CALCULATION /HOPPER/ RECTANGULAR BIN /PRISMOID /FRUSTUM OF PRISMOID/RIGHT PRISMOID