Два лыжник из одного пункта в противоложных направлениях. скорость одного лыжник 15 км/ч,а другого 10км/ч. на сколько км они удаляться друг от друга за 1 ч.? за 2 ч. ? за 3 ч.?
Амбрела123
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18.07.2019 20:50
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2) 25+25=50 (км)-за 2 часа.
3) 25+25+25=75 (км)- за 3 часа.
ответ: 75 км