Hauv Qib 3 cov chav kawm lej peb tau kawm txog 'ntim' ntawm cov duab. Peb siv tus qauv: Volume = ntev × dav × qhov siab / qhov tob nrhiav qhov ntim ntawm cov duab tsis tu ncua thiab suav cov ntsuas kom pom qhov ntim ntawm cov duab tsis xwm yeem. Tom qab ntawd peb tau tsim peb tus kheej tsim siv raws nraim 20 lub voos xwmfab thiab muab tso rau lawv zoo li kev kos duab rau lwm tus menyuam kawm ntawv pom, thiab nug cov lus nug kom lawv xav.
International School 
