 
 <translate> The friend drives 40 * 3 = 120 miles. Thus, Christina drives 210 - 120 = 90 miles. Since the speed limit is 30 miles per hour when Christina is driving, she drives for 90 / 30 = 3 hours. Thus, she drives for 3 * 60 = 180 minutes. So the answer is 180. <ibo> Enyi ahụ na-akwọ ụgbọala 40 * 3 = 120 kilomita. N'ihi ya, Christina na-eji ụgbọala aga kilomita 210 - 120 = 90. Ebe ọ bụ na a machibidoro ịgba ígwè ịgba kilomita iri ise n'otu awa mgbe Christina na-akwọ ụgbọala, ọ na-agba ụgbọala ahụ awa iri itoolu na ọkara ruo awa atọ. N'ihi ya, ọ na-akwọ ụgbọala ruo minit 3 * 60 = 180. Ya mere azịza ya bụ 180. 