Question

Цену велосипеда повысили на 20%, через два месяца еще на 15%, после чего велосипед стал стоить 552 рубля. Какова первоначальнаястоимость велосипеда?​

Answer 1

Ответ:

400 рублей

Объяснение:

Вычисляем наценку:

100%+20% = 120% = 1.2 - первая доля наценки

вторая доля наценки 15% = 1.15

1) 1.2*1.15=1.38

2) 552:1.38=400 рублей - первоначальная цена

Answer 2

Calculation of the Initial Cost of the Bicycle

To calculate the initial cost of the bicycle, we need to reverse the price increases.

Let's assume the initial cost of the bicycle is represented by the variable 'x'.

The price of the bicycle was increased by 20% initially, and then by an additional 15% after two months.

To reverse the 15% increase, we need to divide the final price by 1.15.

To reverse the 20% increase, we need to divide the result by 1.20.

The final price of the bicycle is given as 552 rubles.

Let's calculate the initial cost step by step:

1. Reverse the 15% increase: 552 / 1.15 = 480 rubles (approximately). 2. Reverse the 20% increase: 480 / 1.20 = 400 rubles (approximately).

Therefore, the initial cost of the bicycle was approximately 400 rubles.

Please note that the above calculations are approximate due to rounding.