Question

На приобретение учебников по истории,биологии и географии школа затратила 32400р.За учебники по истории заплатили 28% этой суммы,а за учебники по биологии-40% остатка.Определить стоимость учебников по географии.

Answer 1

32400/100=324

324*28=9072

32400-9072=23328

23328/100=233.28

233.28*40=9331.2

9072+9331.2=18403.2

32400-18403.2= 13996.8

Answer 2

Calculation of the Cost of Geography Textbooks

To determine the cost of the geography textbooks, we need to follow the given information. Let's break down the problem step by step:

1. The school spent a total of 32,400 rubles on textbooks for history, biology, and geography. 2. The history textbooks accounted for 28% of this total amount. 3. The biology textbooks were purchased with 40% of the remaining amount after accounting for the history textbooks.

Let's calculate the cost of the geography textbooks using these percentages:

1. Calculate the cost of history textbooks: - 28% of 32,400 rubles = 0.28 * 32,400 = 9,072 rubles. (Source

2. Calculate the remaining amount after accounting for the history textbooks: - Remaining amount = Total amount - Cost of history textbooks - Remaining amount = 32,400 - 9,072 = 23,328 rubles.

3. Calculate the cost of biology textbooks: - 40% of the remaining amount = 0.40 * 23,328 = 9,331.2 rubles.

4. Calculate the cost of geography textbooks: - The cost of geography textbooks is equal to the remaining amount after accounting for the history and biology textbooks. - Cost of geography textbooks = Remaining amount - Cost of biology textbooks - Cost of geography textbooks = 23,328 - 9,331.2 = 13,996.8 rubles.

Therefore, the cost of the geography textbooks is 13,996.8 rubles.

Please note that the calculations are based on the given percentages and the total amount spent on textbooks.