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теплоход за 8 часов по течению реки и за 5 часов против течения прошел 300 км. определите скорость теплохода, против течения ,если скорость по течению на 5 км в час больше
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Предмет:
Математика -
Автор:
magdalena8ty0 - 6 лет назад
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Ответы 1
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x- скорость против течения x+5 - скорость по течению 8*(x+5)+5x=300 км13x+40=30013x=260x=20 км / чОтвет : 20 км/ч
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Автор:
teodosiao5ot - 6 лет назад
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Tchaikovsky
Piotr Tchaikovsky was born in Votinsk in 1840. He was the son of a mining engineer and his mother was of French ancestry. At a very early age it was obvious that he had a great musical talent and so from the age of five he was given piano lessons. Later, he studied at the St Petersburg Conservatory and later still, he became the professor of theory and harmony at the newly founded Moscow Conservatory. He held the post until 1878.
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