Known conditions: if the school organizes a spring outing for seventh grade teachers and students, if it rents a number of 45 seat buses, it is just full; if it rents a single 60 seat bus, it can rent one less, and the remaining 15 seats (1) Ask for the number of people to take part in the spring outing (2) It is known that the daily rent of a 45 seat bus is 500 yuan per car, and that of a 60 seat bus is 600 yuan per car. Which car is more cost-effective?

Known conditions: if the school organizes a spring outing for seventh grade teachers and students, if it rents a number of 45 seat buses, it is just full; if it rents a single 60 seat bus, it can rent one less, and the remaining 15 seats (1) Ask for the number of people to take part in the spring outing (2) It is known that the daily rent of a 45 seat bus is 500 yuan per car, and that of a 60 seat bus is 600 yuan per car. Which car is more cost-effective?

（1）45X5=60X4-15=225
(2) 500X5=2500 600X4=2400
A: the number of spring outings is 225. It's more cost-effective to rent a 60 seat bus

Help me think about the following math problem
What is the unit of 1.2 and 3 / 5? It has such units
2. Forge three cube iron blocks with the edge length of 6 decimeters into a cuboid iron block with the width and height of 3 decimeters. How high is the cuboid iron block?

1. 1 / 5; 13
2. 6 × 6 × 6 × 3 △ 3 = 72 (decimeter) answer: the height of the rectangular iron block is 72 decimeters

Yongliang supermarket has the same unit price of apples and pears. My mother bought 5kg apples and 8kg pears, of which pear costs 11.7 yuan more than apple. What's the unit price of apples and pears?

11.7 ÷ (8-5) = 3.9 yuan