Question

Первого апреля цену на лыжи снизили на 10% первого мая цену на лыжи снизили ещё на 20% после этого лыжи стали стоить 2880 рублей. сколько стоили лыжи 31 марта?

Answer 1

Calculation of the Original Price of Skis on March 31st

To calculate the original price of the skis on March 31st, we need to work backwards from the final price of 2880 rubles and the given discounts.

Let's assume the original price of the skis on March 31st was x rubles.

On April 1st, the price was reduced by 10%. This means the price on April 1st was 90% of the original price: 0.9x rubles.

On May 1st, the price was reduced by an additional 20%. This means the price on May 1st was 80% of the price on April 1st: 0.8 * 0.9x = 0.72x rubles.

Given that the price on May 1st was 2880 rubles, we can set up the following equation: 0.72x = 2880.

To find the value of x, we can divide both sides of the equation by 0.72: x = 2880 / 0.72.

Calculating this, we find that the original price of the skis on March 31st was 4000 rubles.

Therefore, the skis cost 4000 rubles on March 31st.

Answer:

The skis cost 4000 rubles on March 31st.