 | R Alban Meaden - 1877 - 150 pàgines
..." "" ~"H **. (b) (c) ay-\-bx = cy -\-dx=l. 158. Of two square fields, one exceeds the other by 100 acres, and its side is longer than that of the other...yards. Find the length of the side of each field. 159. A cistern has a supply cock, and also a threeway cock, which can be used either for supply or... | |
 | James Mackean - 1881 - 510 pàgines
...^4а7+7= >/(ж+11). (c) ay + bx = cy + dx = 1. (4.) Of two square fields, one exceeds the other by 100 acres, and its side is longer than that of the other...yards. Find the length of the side of each field. (5.) A cistern has a supply cock, and also a three-way cock which can be used either for supply or... | |
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A cistern has a supply cock, and also a three-way cock which can be used either for supply or discharge at pleasure. When both are used to fill it, it fills in half an hour. When the three-way cock is used to draw off, the other fills it in an hour and... 