 
 <translate> Some question: Two pipes can fill a tank in 20 and 24 minutes respectively and a waste pipe can empty 3 gallons per minute. All the three pipes working together can fill the tank in 15 minutes. The capacity of the tank is?
Options:
(A) 820 gallons
(B) 128 gallons
(C) 120 gallons
(D) 129 gallons
(E) 220 gallons
Some stream of consciousness: <ibo> Ajụjụ ụfọdụ: Ọkpọkọ abụọ nwere ike imeju otu tankị n'ime nkeji iri abụọ na nkeji iri abụọ na abụọ nakwa nkeji iri abụọ na anọ. Ọ bụrụ na ọkpọkọ atọ ahụ arụkọ ọrụ ọnụ, ọ ga-ewe nkeji iri na ise tupu ha eju n'ime tank ahụ. Ike nke tankị ahụ bụ? Nhọrọ: (A) 820 galọn (B) galọn iri abụọ na asatọ (C) 120 galọn (D) galọn 129 (E) 220 galọn Mmetụta ụfọdụ: 