Time required for math test?

Hey,

Well, a situation with a math test is really bothering me right now. Today we took a math test on circle calculations and calculations on solids like prisms, cylinders, cones, and pyramids (10th grade high school). It was announced, so it wasn't a problem. We were given the worksheet and quickly went through the problems. We had our calculators at our disposal during the test, which can also be used to solve equations.

There were 3 tasks:

1. Task: Calculations on circles.
There were four sub-problems (a, b, c, d), and for each sub-problem, you had to enter a value (perimeter, area, radius, or diameter) and calculate the remaining values. Parts c and d were each marked with an asterisk (this is how our math teacher marks more difficult problems) because c was given in the unit "parsec" and d in hectares.

2.Task: Calculations on the cylinder
Given the radius and height of a cylinder, one had to calculate the volume, surface area and the total surface area.

3.Task: Calculations on the cone
This entire problem was marked with an asterisk. You had to calculate a "truncated cone" (just for your information, we'd never actually done a truncated cone before, so you had to figure out how to calculate it in the test, but it's not that complicated, but you still have to think about it for a moment). You were given two radii and two heights, and you had to calculate the surface area and volume of the truncated cone. The entire problem was also quite complicated, so you definitely had to read it carefully. The problem also included a sketch.

20 minutes were planned for these tasks. Because absolutely no one had finished by then, we were given an extra five minutes, but our math teacher wouldn't allow any more than that. After the test, someone also mentioned to him that he usually multiplies his own time for the tasks by three to arrive at the completion time. And then he would have had to solve the problems in seven minutes or so, which would be quite unrealistic. Our math teacher then said that he normally does it that way, but the test only covered "basic arithmetic," and we were supposed to be almost as fast with the problems as he was. I find this classification of the tasks as "basic arithmetic" completely incomprehensible. The tasks that came up were simply our normal topic from class. We started the topic about two months ago and had never had it before. The test we'll be written in two weeks will almost certainly be structured in much the same way. So, I absolutely don't understand this classification as "basic arithmetic."

And based on this assessment, he also adjusted the time for completion, which was simply far too short. At least, everyone in my class thought so, and we're actually a "math-strong class," even our math teacher says so. But the time was simply too short for so much that needed to be done.

Or how would you assess it, is 20/25 minutes too short for a test like this? And can you understand the classification as basic arithmetic? Am I justified in being upset about it? I honestly found it terrible. Because you simply didn't have any time to think. I just about managed the tasks in the time allowed (25 minutes) and couldn't think about them for a second because you simply didn't have time. All the calculations were about two pages long, so you had to write the whole time, otherwise you wouldn't have been able to do all the problems. But when you do it that quickly, you're always going to miss something, especially under such time pressure and exam stress. Or am I exaggerating?