1. The volume of a conical part is 76 cubic centimeters, and its height is 12 centimeters. How big is its bottom area? 2. A cone-shaped wheat pile has a bottom area of 12.56 square meters and a height of 1.5 meters. If each cubic meter of wheat weighs 700 kg, how many kg does the pile weigh? 3. A round tent, 4m in diameter and 3.5m in height How many square meters does the tent cover? How many cubic meters of space does it occupy? Except for the first question, I can do the rest, but I can't do it by 1 / 3 - I want to make an appointment - I can't do it - what should I do

1. The volume of a conical part is 76 cubic centimeters, and its height is 12 centimeters. How big is its bottom area? 2. A cone-shaped wheat pile has a bottom area of 12.56 square meters and a height of 1.5 meters. If each cubic meter of wheat weighs 700 kg, how many kg does the pile weigh? 3. A round tent, 4m in diameter and 3.5m in height How many square meters does the tent cover? How many cubic meters of space does it occupy? Except for the first question, I can do the rest, but I can't do it by 1 / 3 - I want to make an appointment - I can't do it - what should I do

"C-phenanthrene △":
1 / 3 of X can be written as x 1 / 3. In order not to be confused, it can be written as X (1 / 3) or simply as △ 3
76cm³×3÷12cm＝228cm³÷12cm＝19cm²
A: the bottom area of the cone is 19 square centimeters
You'll do the rest. I'll stop,
Good luck and goodbye