Answer
First error is use $D$ instead $r$
Second error is that volumes units is cubic
Correct answer $V = 3.14*3.5^2*5 = 192.3cm^3$
Work Step by Step
We have $D = 7cm$, $h = 5cm$ and $V = 3.14*7*7*5 = 769.3cm^2$
Volume formula for a cylinder is $V = 3.14*r^2*h$
So the first error is to use $D$ instead $r$
And the second error is that volumes units is cubic
Correct answer $V = 3.14*3.5^2*5 = 192.3cm^3$
