Question
Find the number of liters of water needed to reduce 9 liters of lotion. shave containing 50% alcohol to a lotion containing 30% alcohol.
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Answer to a math question Find the number of liters of water needed to reduce 9 liters of lotion. shave containing 50% alcohol to a lotion containing 30% alcohol.
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4.794 Answers
Solución:
Sea x el número de litros de agua que se van a añadir. Por lo tanto, el volumen después de agregar agua es 9+x.
La cantidad de alcohol se mantendría constante antes y añadiendo el agua. Por lo tanto,
0.5\izquierda(9\derecha)=0.3\izquierda(9+x\derecha)
Resolviendo para x,
4,5=2,7+0,3x
0,3x=1,8
x=6
Respuesta: Se deben agregar 6 litros de agua para diluir una loción con 50% de alcohol hasta 30% de alcohol.
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