Mwachitsanzo: pogula mafupa 3000 a matumba a 130 x 6m, kukula kwa mafupa kumakhala 115 x 5980, ndipo njira yowerengera ndi 0.115 * 0.115 * 6 *3000=238.05. Zotsatira zake ndi 238.05 cubic metres. Nthawi zambiri, malo okhala ndi mafupa amatha kukhala ochulukirapo kuposa momwe amawerengera kwenikweni chifukwa cha vuto loyika potsitsa. Choncho, pafupifupi chiwerengero ndi 240 kiyubiki mamita. Mwanjira iyi, mutha kudziwa zonyamula zonse mwa kuchulukitsa mtengo pa mita kiyubiki, ndikugawaniza ndi kuchuluka kwake. Zoonadi, ngati kasitomala sali mofulumira, angapeze galimoto yobwerera, ndipo katunduyo adzakhala wotsika mtengo.
