Question

В библиотеке книги по архитектуре хранятся на трех стеллажах.На первом и втором 780 книг,а на третьем-в 3 раза меньше,чем на первом.Сколько всего книг хранится на стеллажах,если на втором стеллаже хранится на 240 книг больше,чем на первом?

Answer 1

На первом:(780-240)/2=270 на втором:270+240=510 на третьем:270/3=90

Answer 2

Calculating the Total Number of Books in the Library

To calculate the total number of books in the library, we can follow these steps:

1. Let's denote the number of books on the first shelf as x. 2. The number of books on the second shelf is 780 more than the number on the first shelf, so it is x + 780. 3. The number of books on the third shelf is three times fewer than the number on the first shelf, so it is x / 3.

Now, we can use this information to find the total number of books in the library.

Calculation

The total number of books in the library is the sum of the books on all three shelves:

Total = x + (x + 780) + (x / 3)

Given that the number of books on the second shelf is 240 more than the number on the first shelf, we can express this as:

x + 780 = x + 240

Solving for x:

x = 540

Now, we can substitute the value of x into the total calculation:

Total = 540 + (540 + 780) + (540 / 3)

Total = 540 + 1320 + 180

Total = 2040 + 180

Total = 2220

Answer

The total number of books stored on the three shelves in the library is 2220.