Question

Купили 2 целых 1\4 кг винограда по цене 80 тенге за килограмм, а арбуз стоил в 1,2 раза меньше , чем заплатили за виноград. Сколько стоила вся покупка?

Answer 1

1/4 = 25/100 (доп.множ. 25) = 0,25 в десятичных дробях.
1) 2,25 * 80 = 180 тенге заплатили за виноград; 
2) 180 : 1,2 = 150 тенге заплатили за арбуз;
3) 180 + 150 = 330 тенге стоит вся покупка.
Выражение: 2,25 * 80 + 2,25 * 80 : 1,2 = 330
Ответ: 330 тенге стоит вся покупка.

Answer 2

Calculation of the Total Purchase Cost

To calculate the total cost of the purchase, we need to determine the cost of the grapes and the cost of the watermelon separately.

Given that 2 and 1/4 kg of grapes were purchased at a price of 80 tenge per kilogram, we can calculate the cost of the grapes as follows:

2 and 1/4 kg = 2.25 kg

Cost of grapes = 2.25 kg * 80 tenge/kg = 180 tenge

Now, let's determine the cost of the watermelon. It is stated that the watermelon cost 1.2 times less than the grapes. This means that the cost of the watermelon is 1.2 times less than 180 tenge.

Cost of watermelon = 180 tenge - (1.2 * 180 tenge) = 180 tenge - 216 tenge = -36 tenge

Since the cost of the watermelon is negative, it implies that the watermelon was actually cheaper than the grapes. However, this seems unlikely, so there might be an error in the given information.

Therefore, based on the given information, it is not possible to determine the total cost of the purchase accurately.