 
<translate> Ajụjụ: Otu ụgbọala na-eji mmanụ ụgbọala dị galọn iri na abụọ eme njem dị narị kilomita anọ na iri ise. Iji mee ka ụgbọala jiri galọn mmanụ ụgbọala iri mee otu njem ahụ, kilomita ole ka a ga-amụba maka galọn ọ bụla nke mmanụ ụgbọala ahụ? Nhọrọ: (A) 2 (B) 4 (C) 6 (D) 7 (E) 10 Ka anyị buru ụzọ chee echiche. Ụfọdụ echiche na-enweghị isi: <eng> Question: A certain car uses 12 gallons of gasoline in traveling 420 miles. In order for the car to travel the same distance using 10 gallons of gasoline, by how many miles per gallon must the car’s gas mileage be increased?
Options:
(A) 2
(B) 4
(C) 6
(D) 7
(E) 10 Let's think first. Some random reasoning: 