Section I - Multiple Choice (2 Viewers)

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Apart from your mistake with 16, I made 2 mistakes with 7 and 14..
I agree with every one of your answers EXCEPT i'm not sure on 15? I got A.


EDIT: Damn, just looked through everyone elses answers and they all got D for 15. So if me and you are correct with the rest, you should get 21/22 and i should get 19/22.. Lets hope
Ok sweet :) And yeah I'm pretty sure 15 is D. You have to have the square root over the whole number, not just the numerator.
 

sadcase

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Wasn't question 19 actually D. Because the total radius is 12 and the height is 24. Hence, Pie time 12 squared times 24= 10857cm cubed.
please share ur solution
 

jamesjoker

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Wasn't question 19 actually D. Because the total radius is 12 and the height is 24. Hence, Pie time 12 squared times 24= 10857cm cubed.
please share ur solution
the formula is [pie x "radius(squared)" x height"

12 is the "diameter" not the "radius"

so the solution was v= pie x 6 (squared) x 24
= 2714cm (cubed)
 

sadcase

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Yes ok but there were two spheres each with radius 6. so when you look at the question again, the middle of the cylinder has a radius if 12. not 6
 

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