The volume of a cylinder is found using the formula V = πr2h. Using π = 5, r = 10 and h = 10. Find the volume V.

    • oolio@feddit.deEnglish
      19·
      1 year ago

      Considering that the r and h are 10, you could still easily do it without calculator, even if the value of pi had plenty of decimals.

      • queermunist she/her@lemmy.mlEnglish
        131·
        1 year ago

        Yeah it’s not hard, but if the instructor just wants to test if you can follow directions and plug extremely simple numbers into an equation without a calculator then this is fine. I’d almost expect this on a test for some trade skill, like some 1-2 year certification you know?

        it could still =3 tho

        • drcobaltjedi@programming.devEnglish
          4·
          1 year ago

          I remember doing multiplication with decimals using lattice multiplication. It’s not hard you just need to know how to move the decimal.

          Side note, I remember in precalc in high school the teacher marked a student wrong on a test, for showing his work using lattice, because the teacher didn’t understand it. The work was right, he showed his work, teacher just didn’t know it so it was wrong. Man I hated that teacher.

            • drcobaltjedi@programming.devEnglish
              2·
              1 year ago

              Yeah and i was a defiant little shit in high school. Always going to the exact limits of all the rules we were given. Some of the school security didn’t like me, but the teachers did

        • Spzi@lemm.eeOPEnglish
          4·
          1 year ago

          I also guess that was the intention. But then, why choose an example involving Pi? There are so many ways to test simple multiplications. Books per student, students per class, classes per school, something like that. Or calculate a simple 3D shape which is not round.