Supplementary question: 435 teachers in the fourth grade of experimental primary school plan to travel to Black Valley. You can only choose one of the following two kinds of cars to rent. What kind of

Supplementary question: 435 teachers in the fourth grade of experimental primary school plan to travel to Black Valley. You can only choose one of the following two kinds of cars to rent. What kind of car is cost effective? The cost per guest is:

600÷30=20 (yuan);

The per capita cost of medium-sized buses is:

450÷20=22.5 yuan;

So renting a bus is more cost-effective.

435÷30= 14 cars ... 15 people.

Need to spend:

( 14+ 1)×600

= 15×600,

=9000 yuan.

A: It is more cost-effective to rent a bus, 9000 yuan.