1001 задача для умственного счета в школе С. А. Рачинского, стр. 20
999. В комнате длиною в 7 аршин, шириной в 5 нужно сделать паркетный пол из квадратных дощечек, сторона которых — 4 вершка. Сколько пойдет дощечек? [560]
1000. Ковер длиною в 3 аршина, шириною в 2 аршина 8 вершков стоит 15 руб. Что будет стоить ковер того же качества длиною в 10 аршин, шириною в б аршин? [120 руб.]
1001. Мне вырыли пруд длиною в 8 саженей, шириною в 4 сажени, глубиною в 1 сажень 1 аршин 8 вершков. За каждую вынутую кубическую сажень берут 1 руб. 50 коп. Сколько я заплатил? [72 руб.]
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