+1124 Hi friends,
a most ridicilous question in my opinion..
A lead cast in the shape of a cone with a base diameter of 210mm and a perpendicularf height of 110mm is melted and recast in the shape of a sphere....
WHY ON EARTH could they just not say...A sphere with dimentions this and that...surely we cannot use these dimentions for the sphere?They want tyhe diameter and surface area...
I am thinking about this logically....surely the diameter of the sphere will and can never be 210mm?
+118667 A lead cast in the shape of a cone with a base diameter of 210mm and a perpendicular height of 110mm
is melted and recast in the shape of a sphere....
You need to find the VOLUME of the cone first.
Can you do that please ?
+1124 Oookay... I can see your angle... I think Ill be able to crack this one... Melody!!... Thank you kindly..
WHY ON EARTH could they just not say...
Jurie, the point of this – indeed, of math questions in general – is to train your mind to think logically. In this example, you must work the formula (for the volume of a cone) forward to obtain the volume (amount of lead) of the cone, then work the formula (for the volume of a sphere) backward to obtain the radius of the sphere.
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+1124 Hi guest,
absolutely correct, all of this came to me as well the moment I saw the "hint" from Melody to calculate the volume. I immediately understood things that way. I also explained precisely this to my student, the questions are formulated in this way sometimes, to cause you to think out of the box. Thank you for sharing!
