Two cars set out from a certain place at the same time to transport a batch of goods to the construction site 165 kilometers away. Car a arrived 18 minutes earlier than car B. when car a arrived, car B returned

Two cars set out from a certain place at the same time to transport a batch of goods to the construction site 165 kilometers away. Car a arrived 18 minutes earlier than car B. when car a arrived, car B returned

Car B arrives 48 minutes later than car a, and the distance is 24 kilometers. It can be seen that the speed of car B is 30 kilometers per hour, and it takes 5 hours and 30 minutes for car B to complete the whole journey. Car a is 48 minutes earlier than car a, so it should take 4 hours and 42 minutes for car a to complete the whole journey

Two cars set out from a certain place at the same time to transport a batch of goods to the construction site 165 kilometers away. Car a arrived 48 minutes earlier than car B. when car a arrived, car B was 24 kilometers away from the construction site. How many hours did car a spend on the whole journey?

48 minutes = 0.8 hours; 24 △ 0.8 = 30 (km / h); 165 △ 30-0.8, = 5.5-0.8, = 4.7 hours; a: it took 4.7 hours for car a to complete the whole journey