Question

На поливання огірків хлопчик витратив 25 л води, що становило четверту частину води, якабула в бочці.Потім 30 л води він витратив на поливання яблунь. скільки літрів води залишилося в бочці? Розвяжіть задачу 2 способами.

Answer 1

1 способ : 
25*4= 100 (л) - всего в бочке
100- ( 25+30)=45 (л) - осталось
2 способ:
25*4=100 л- всего
1-0,25-0,30=0,45 или 45 литров из 100 ( осталось ) 

Answer 2

25*4=100

25+30+х=100

55+х=100

х=100-55

х=45

Answer 3

Problem Statement

A boy used 25 liters of water to water the cucumbers, which was one-fourth of the water in the barrel. Then he used 30 liters of water to water the apple trees. The question is, how many liters of water are left in the barrel? Solve the problem using two different methods.

Method 1: Proportions

Let's solve the problem using proportions. We know that the boy used 25 liters of water, which is one-fourth of the water in the barrel. Let's represent the total amount of water in the barrel as 'x'.

According to the problem, we can set up the following proportion:

25 liters / x = 1/4

To solve for 'x', we can cross-multiply and solve the equation:

25 * 4 = x

x = 100 liters

Therefore, the total amount of water in the barrel is 100 liters.

Next, the boy used an additional 30 liters of water to water the apple trees. To find out how much water is left in the barrel, we subtract the amount used from the total amount:

100 liters - 30 liters = 70 liters

So, there are 70 liters of water left in the barrel.

Method 2: Subtraction

Another way to solve the problem is by using subtraction. We know that the boy used 25 liters of water, which is one-fourth of the water in the barrel. Let's represent the total amount of water in the barrel as 'x'.

According to the problem, we can set up the following equation:

x - 25 liters = 3/4 * x

To solve for 'x', we can simplify the equation:

4x - 100 = 3x

x = 100 liters

Therefore, the total amount of water in the barrel is 100 liters.

Next, the boy used an additional 30 liters of water to water the apple trees. To find out how much water is left in the barrel, we subtract the amount used from the total amount:

100 liters - 30 liters = 70 liters

So, there are 70 liters of water left in the barrel.

In both methods, we found that there are 70 liters of water left in the barrel after the boy used 25 liters to water the cucumbers and 30 liters to water the apple trees.