Question

В саду растут яблони, груши и сливы. яблоки составляют восемь пятнадцатых, груши четыре пятнадцать всех деревьев, а число слив 12. сколько всего деревьев в саду? сколько в нём яблонь и груш?

Answer 1

Я-8/15 от  оп
Г-4/15 от  оп
С- 12 шт
8/15+4/15+3/15=1
значит сливы 3/15 или 1/5 от общего количества,решаем пропорцию
если 12 шт - 1/5,
то      х  шт - 4/15,
х=(12*4/15)/1/5
х=16 шт., значит груш = 16 шт., то же самое с ялонями
если 12 шт - 1/5
то      х шт - 8/15
х=(12*8/15)/1/5
х= 32, значит яблонь 32 шт.
общее кол-во = 32+16+12=60 шт.

Answer 2

Problem Analysis

We are given that there are apple trees, pear trees, and plum trees in a garden. The proportion of apple trees to all trees is 8/15, the proportion of pear trees to all trees is 4/15, and there are 12 plum trees. We need to determine the total number of trees in the garden and the number of apple and pear trees.

Solution

Let's assume the total number of trees in the garden is x.

According to the given information: - The proportion of apple trees to all trees is 8/15, so the number of apple trees is (8/15) * x. - The proportion of pear trees to all trees is 4/15, so the number of pear trees is (4/15) * x. - The number of plum trees is 12.

To find the total number of trees in the garden, we can set up the following equation:

(8/15) * x + (4/15) * x + 12 = x

Simplifying the equation:

(8/15 + 4/15) * x + 12 = x

(12/15) * x + 12 = x

12x + 180 = 15x

180 = 15x - 12x

180 = 3x

x = 180/3

x = 60

Therefore, the total number of trees in the garden is 60.

To find the number of apple trees, we can substitute the value of x back into the equation:

Number of apple trees = (8/15) * x = (8/15) * 60 = 32

To find the number of pear trees, we can substitute the value of x back into the equation:

Number of pear trees = (4/15) * x = (4/15) * 60 = 16

Answer

The total number of trees in the garden is 60. There are 32 apple trees and 16 pear trees.