 
 <translate> The estimated time of arrival from Washington to Idaho is 640 / 80 = 8 hours. So, the estimated time of arrival from Idaho to Nevada is 550 / 50 = 11 hours. Therefore, It took him 11 + 8 = 19 hours to arrive at the destination. So, the answer is 19. <ibo> Oge e mere atụmatụ na ọ ga-ewe iji si Washington ruo Idaho bụ awa 640 / 80 = awa asatọ. Ya mere, oge e mere atụmatụ na ọ ga-ewe iji si Idaho ruo Nevada bụ 550 / 50 = awa 11. N'ihi ya, o were ya awa iri na otu gbakwunyere asatọ, ya bụ, awa iri na itoolu iji ruo ebe ọ na-aga. Ya mere, azịza ya bụ 19. 