How to find surface area and volume of a cone
Surface area:We know that the base of a cone is a circle, which has a surface area of πr2, where r is the radiusThe rest of the area will be π, r and l (the slanted length) multiplied togetherAnd then, we just add them together: πr2+πrl
Volume:We can think of a cone's volume as a third of a cylinder's volume of the same height and radius (can explain more with a diagram)The cylinder's volume is the base times the height= πr2hTherefore, the cone's volume is equal to (πr2h)/3(note: sorry if these look messy, I couldn't save rows as separate)
FF
Related Maths GCSE answers
All answers ▸Benjamin has a 0.7 chance of passing his driving test the first time and a 0.85 chance of passing the second time. What is the probability of his passing on either the first or second try?
Solve 4x^2 - 3x - 4 = 0
A 20-foot ladder is leaning against a vertical wall. The bottom of the ladder is pulled away horizontally from the wall at 3 feet per second. How fast is the top of the ladder sliding down the wall when the bottom of the ladder is 10 feet away?
5, 11, 21, 35, 53, ... Find the nth term of this sequence.