Question

Цена магнитофона увеличилась в январе на 25% и составила 1600 р., а в феврале увеличилась еще на 15%. Сколько стоил магнитофон до подорожания и сколько он стал стоить в феврале?

Answer 1

1200 рублей стоил магнитофон до подоражания, а в феврале он стоит 1840

Answer 2

X-начальная цена магнитофона.
100/x=125/1600
125x=1600*100
125x=160000
x=160000/125
x=1280(р.)-начальная цена магнитофона.
1600:100*25=240(р.)-магнитофон подорожал в феврале.
1600+240=1840(р.)-магнитофон стал стоить в феврале.
Ответ:1280 рублей, 1840 рублей.

Answer 3

Calculating the Price Changes of a Tape Recorder

To calculate the price changes of the tape recorder, we can follow these steps:

1. Initial Price of the Tape Recorder: - The initial price of the tape recorder can be calculated using the price after the January increase and the percentage increase in January.

2. Price in February: - After calculating the initial price, we can then determine the price of the tape recorder in February after the additional 15% increase.

Calculation

1. Initial Price of the Tape Recorder: - The price after the January increase was 1600 rubles with a 25% increase. - Let's calculate the initial price before the January increase: - Initial Price = Price after January increase / (1 + Percentage increase in January) - Initial Price = 1600 / (1 + 0.25) - Initial Price = 1600 / 1.25 - Initial Price = 1280 rubles

- Result: The initial price of the tape recorder was 1280 rubles.

2. Price in February: - The price in February increased by an additional 15% from the initial price. - Let's calculate the price of the tape recorder in February: - Price in February = Initial Price * (1 + Percentage increase in February) - Price in February = 1280 * (1 + 0.15) - Price in February = 1280 * 1.15 - Price in February = 1472 rubles

- Result: The tape recorder cost 1472 rubles in February after the additional 15% increase.

So, the tape recorder cost 1280 rubles before the price increase and 1472 rubles in February after the additional 15% increase.

I hope this helps! If you have any other questions, feel free to ask.