~紫瑩~ 23-9-2005 21:20
升中四的數學題功課
1.A right cylindrical container 8 cm in base diameter contains water. 6 metallic balls of radii 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 base radius and height of a right circular cone are both increased by 20%. Let A1 and A2 be the original curved surface area and the new curved surface area respectively.
a.) Express A2 in term of A1.
b.) Find the percentage increase in curved surface area.
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重問:
1.Dicky is given $65 to buy apples and oranges for a birthday party. An apple costs $2, an orange costs $1.5
a.) Find the maximum and minimum numbers or fruits he can buy.
b.)Suppose he decides to buy at least 5 of each type of fruit. Find the maximum number of fruits he can buy.
2.If Q exceeds P by 50% and R exceeds Qby 50%, find P:R.
( answer correct to 1 decimal place )
3.The selling price of a dozen of eggs is equal to the cost price of 15 eggs. Find the percentage profit. ( answer correct to 1 decimal place )
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因為不太明白,而且有一些地方是找不到~所以不懂做~
而重問的那一些是因為之前別人回答的我覺得有問題~但仍然不太明~所以再問~
請問有人可以救救我怎樣做嗎?
謝謝~