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Have a drink, listen, take a look, smell the aroma, my 7723. Also: Little B should take a closer look at the end: Several classmates were playing cards and chatting together. One of the girls casually asked: What kind of bra cup do you think the four ounces in "Friendship is worth a thousand dollars" are? Then another child immediately picked up the pen and paper and started to calculate. The calculation process is: four taels = 200g, then the mass of an rf is m = 100g. The density of the human rf is calculated according to the density of human fat (0.79g/cm3), then the volume of an rf is V = 126.6cm3. The shape of the rf is approximated as a hemisphere, 1 /2*4/3∏r3=126.6cm3, find the radius r of rf=3.92cm, the difference between the upper and lower circumferences is approximately the difference between the circumferences of the two ellipses, the ellipse The formula for the circumference of a circle is L = ∏ (a + b). The b values of the two ellipses are equal, and the difference in the a value is equal to the radius r of rf. ΔL = ∏r = 12.3 is obtained. According to the cup classification, AA is about 7.5cm, A is about 10cm, B is about 12.5cm, C is about 15cm, D is about 17.5cm, and E is about 20cm. The answer is: a breast of four ounces is only a small B at most, which means that a thousand dollars of friendship is not worth a small B! !