Question

СРОЧНО ЗАДАЧУ РЕШИТЕ^3 Штангист тяжелой весовой категории поднял штангу массой в 156 кг.,а штангист легкой весовой категории поднял штангу,масса которой составляет 9\13 массы первой.На сколько килограмм масса первой штанги больше массы второй штанги?

Answer 1

156*9/13=12*9/1=108кг-масса второй штанги
156-108=48 кг-на столько

или

1-9/13=4/13-на такую часть массы первой штанги меньше 
156*4/13=12*4/1=48кг

Answer 2

Problem Analysis

We are given that a heavyweight weightlifter lifted a barbell weighing 156 kg, and a lightweight weightlifter lifted a barbell that weighs 9/13 of the weight of the first barbell. We need to find the difference in weight between the two barbells.

Solution

To find the difference in weight between the two barbells, we need to subtract the weight of the second barbell from the weight of the first barbell.

Let's denote the weight of the first barbell as W1 and the weight of the second barbell as W2.

We are given that the weight of the first barbell is 156 kg. Therefore, W1 = 156 kg.

We are also given that the weight of the second barbell is 9/13 of the weight of the first barbell. Therefore, W2 = (9/13) * W1.

To find the difference in weight between the two barbells, we subtract W2 from W1:

Difference in weight = W1 - W2

Let's substitute the values of W1 and W2 into the equation:

Difference in weight = 156 kg - (9/13) * 156 kg

Now, let's calculate the difference in weight:

Difference in weight = 156 kg - (9/13) * 156 kg

Using the given values, we can calculate the difference in weight.

Calculation

Let's calculate the difference in weight between the two barbells:

Difference in weight = 156 kg - (9/13) * 156 kg

Difference in weight = 156 kg - (9/13) * 156 kg

Difference in weight = 156 kg - (9/13) * 156 kg

Difference in weight = 156 kg - 108 kg

Difference in weight = 48 kg

Therefore, the weight of the first barbell is 48 kg more than the weight of the second barbell.

Answer

The weight of the first barbell is 48 kg more than the weight of the second barbell.

Source:

'Matematika 6 Kl Vilenkin 1 Chast 2017 - Calamo' - Nikita Plushenko