This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1909 edition. Excerpt: ...Therefore =.5 6 i (90+x) =6 10 36+ = 60 o x = 60 2. If 80 lb. of sea-water contain 4 lb. of salt, how much fresh water must be added to make a new solution of which 45 lb. contain lb. of salt? 3. In a mass of alloy for watch-cases, which contains 60 oz., there are 20 oz. of gold. How much copper must ...
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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1909 edition. Excerpt: ...Therefore =.5 6 i (90+x) =6 10 36+ = 60 o x = 60 2. If 80 lb. of sea-water contain 4 lb. of salt, how much fresh water must be added to make a new solution of which 45 lb. contain lb. of salt? 3. In a mass of alloy for watch-cases, which contains 60 oz., there are 20 oz. of gold. How much copper must be added so that in a case weighing 2 oz. there will be oz. of gold? 4. In an alloy weighing 80 grams, there are 34 grams of gold. How much nickel must be added so that a ring made from the new alloy and weighing if grams shall contain j gram of gold? 5. In an alloy weighing a oz. there are 6 oz. of gold. How much of another metal must be added so that a portion weighing c oz. shall contain d oz. of gold? 6. Gun metal is composed of tin and copper. 4,100 lb. of gun metal of a certain grade contain 3,444 lb. of copper. How much tin must be added so that 2,100 lb. shall contain 1,722 lb. of copper? Lever Problems Two weights, wi and w2, Fig. 184, will balance on a beam that lies across a stick when the distances, 5H di and d2, of weights from the stick 1 are m tne mverse ratio of their d w FIg. 184 weights: i.e., when v=--. & ' dn Wl 1. Find dit if (1) d2=18ft., ?i'2 = 60 1b., ? = 50 lb. (2) e?2 = 27in., w2 = 36 lb., = 24 lb. 2. Find d2, if (1) d, = 40in., w2=16 lb., w, = 18 lb. (2) d, = 25in., u)2=3.81b., w, = 2.85 1b. 3. Find wh if (1) d1 = 2.5 in., d2 = 7.5 ft., w2=10.51b. (2) rf, = 6.6 ft., d2=9.9ft., w, = 171b. 4. Find w2, if (1) di=3.5 ft., di=8.5 ft., w, = 301b. Mixture Problems 1. What per cent of evaporation must take place from a 6 per cent solution of salt and water (salt-water of which 6 per cent by weight is salt) to make the remaining portion of the mixture an 8 per cent solution? Let x be the number of per cent...
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Add this copy of First-Year Mathematics for Secondary Schools to cart. $106.02, like new condition, Sold by Phatpocket Limited rated 4.0 out of 5 stars, ships from Waltham Abbey, ESSEX, UNITED KINGDOM, published 2010 by Nabu Press.
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Seller's Description:
Like New. Used-Like New. This is a reproduction of an out of print title. This book may have occasional imperfections such as missing or blurred pages, poor pictures, errant marks, etc. that were either part of the original artifact, or were introduced by the scanning process. Ships from UK in 48 hours or less (usually same day). Your purchase helps support Sri Lankan Children's Charity 'The Rainbow Centre'. 100% money back guarantee. We are a world class secondhand bookstore based in Hertfordshire, United Kingdom and specialize in high quality textbooks across an enormous variety of subjects. We aim to provide a vast range of textbooks, rare and collectible books at a great price. Our donations to The Rainbow Centre have helped provide an education and a safe haven to hundreds of children who live in appalling conditions. We provide a 100% money back guarantee and are dedicated to providing our customers with the highest standards of service in the bookselling industry.
