Exercise 9B | Question 1,2,3,4,5 | New Secondary Mathematics 3 | Oxford updated 7 edition| D3

Exercise 9B| Question 1,2,3,4,5 | Volume and Surface Area of Cube, pyramid and sphere | New Secondary Mathematics 3 | New syllabus Mathematics 3 D3 updated 7 edition

0:00 Find volume of following cones
3:00 The volume of cone with circular base of radius 8cm is 320 pie. Find its height.
3:56 A cone has a base area of 20 and Volume is 160. Find the height of cone.
4:58 A cone has a height of 14cm and volume of 132. Find the radius of circular base.
5:32 Find the total surface area if cone.

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[GOLDENGAMINGK]

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[asima]

In the first question part b you wrote 154 as pie×radius² because that was the base area of the circle and area of a circle formula is also pie×radius² but in question 3 they already provided us with a base area of the circle and instead of putting that value in pie×radius², you started to work out on finding the radius. Why didn't you do this in question one b part then?

[sMentorTeaching]

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[reetajahanzeb]

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[ScarletBaka]

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