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" 7. Two men start from the same place and travel in opposite directions : one travels 3 miles an hour, and the other 4 miles an hour ; how far apart will they be at the end of 1 hour ? of 2 hours ? of 5 hours "
AN INTELLECTUAL ARITHMETIC, WITH AN INTRODUCTION TO WRITTEN ARITHMETIC. - Σελίδα 40
των A. WALTON, ELECTRA N. L. WALTON - 1869
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...for a chain, 1 dollar for a key, and 5 dollars for a pin; how many dollars did she give for all? 8. Two men start from the same place and travel in opposite directions, one at the rate of two miles in an hour, and the other six; how far apart are they in 7 hours? How far...

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