Question

В прошлом году стиральная машина стоила 400 у.е. В январе этого года она стала дороже на 20%, в феврале она стала дороже еще на 10%. На сколько (кол-во у.е.) возросла стоимость стиральной машины с прошлого года?

Answer 1

1) 400:100*20=80 (у.е.) - подорожала в январе;
2) 400+80=480 (у.е.) - стала стоить после изменения цены в январе;
3) 480:100*10=48 (у.е.) - подорожала в феврале;
4) 480+48=528  (у.е.) - стала стоить после изменения цены в феврале;
5) 528-400=128 (у.е.) - разница до и после.
Ответ: 128 у.е.

Answer 2

(400х0,2)+(400х0.1)=128
на 128 у.е.

Answer 3

Calculation of the Increase in the Cost of the Washing Machine

To calculate the increase in the cost of the washing machine from last year, we need to consider the price increase of 20% in January and an additional increase of 10% in February.

Let's assume that the initial cost of the washing machine last year was $400.

In January, the price increased by 20%. To calculate the new price, we can multiply the initial cost by 1.2 (100% + 20% = 120%):

New price in January = $400 * 1.2 = $480.

In February, the price increased by an additional 10%. To calculate the new price, we can multiply the price in January by 1.1 (100% + 10% = 110%):

New price in February = $480 * 1.1 = $528.

Therefore, the cost of the washing machine increased by $528 - $400 = $128 from last year.

So, the cost of the washing machine increased by $128 from last year.

Please note that the above calculation assumes a simple percentage increase and does not take into account any other factors that may affect the price of the washing machine.

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