First if you want to check your answer take the answer you got and divided it by one of the other numbers like 457*342=156,294 and then dived 156,294 by 342=475 and that's how you know its correct!:) And how you get the answer
4 (20/12) ÷ (4-3)
Simplify
4 (10/6) ÷ 1
Anything divided by one is itself
4 (10/6)
which would give you 40/6, which is better kept as a fraction because of recurring numbers
Hope this helped
Answer: 137.25π ≈ 431.18 cm³
<u>Step-by-step explanation:</u>
Entire Cone - Tip of Cone = Frustrum