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maths問題唔識
1.) A right cylindrical container 8 cm in base diameter contains water. 6 metallic balls of redaii 2 cm are put into the container. If all the balls are immersed and no water overflows, find the rise in water level.2.) The ratio of the curved surface areas of two similar cones is 9:49 . Find the ratio of... 顯示更多 1.) A right cylindrical container 8 cm in base diameter contains water. 6 metallic balls of redaii 2 cm are put into the container. If all the balls are immersed and no water overflows, find the rise in water level. 2.) The ratio of the curved surface areas of two similar cones is 9:49 . Find the ratio of their (a) base radii, (b) heights, (c) volumes, (d) base circumferences. 唔該!
最佳解答:
As follows~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 圖片參考：http://i248.photobucket.com/albums/gg191/ncy_0916/maths285.jpg 2009-08-29 14:49:53 補充： Sorry for some mistake I've made. the ratio of base circumferences should be = r / R = 7 : 3 (not 3 : 7) 2009-08-29 14:54:08 補充： Sorry for some mistake I've made again. the ratio of base circumferences should be = r / R = 3 : 7 (not 7 : 3)
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maths問題唔識
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發問:1.) A right cylindrical container 8 cm in base diameter contains water. 6 metallic balls of redaii 2 cm are put into the container. If all the balls are immersed and no water overflows, find the rise in water level.2.) The ratio of the curved surface areas of two similar cones is 9:49 . Find the ratio of... 顯示更多 1.) A right cylindrical container 8 cm in base diameter contains water. 6 metallic balls of redaii 2 cm are put into the container. If all the balls are immersed and no water overflows, find the rise in water level. 2.) The ratio of the curved surface areas of two similar cones is 9:49 . Find the ratio of their (a) base radii, (b) heights, (c) volumes, (d) base circumferences. 唔該!
最佳解答:
As follows~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 圖片參考：http://i248.photobucket.com/albums/gg191/ncy_0916/maths285.jpg 2009-08-29 14:49:53 補充： Sorry for some mistake I've made. the ratio of base circumferences should be = r / R = 7 : 3 (not 3 : 7) 2009-08-29 14:54:08 補充： Sorry for some mistake I've made again. the ratio of base circumferences should be = r / R = 3 : 7 (not 7 : 3)
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