Question

Для того чтобы связать шапку, варежки и носки, рукодельнице нужно 300 граммов шерсти красного цвета. Можно купить красную пряжу по цене 70 рублей за 60 граммов, а можно купить неокрашенную по цене 40 рублей за 50 граммов. Один пакетик краски стоит 30 рублей и рассчитан на окраску 100 граммов пряжи. Какой вариант покупки дешевле? В ответе напишите, сколько рублей рублей будет стоить эта покупка.

Answer 1

Дешевле купить неокрашенную пряжу с краской , выйдет за 330р.   А готовая стоит 350. выходит дешевле на 20р.

Answer 2

Calculation of the Cost for Knitting Supplies

To determine which option is cheaper, let's calculate the cost of buying the red yarn and dye separately, as well as the cost of buying the pre-dyed red yarn.

1. Option 1: Buying Red Yarn and Dye Separately - The price of red yarn is 70 rubles for 60 grams. - To obtain 300 grams of red yarn, we need to buy 5 packs of 60 grams each, which would cost 5 * 70 = 350 rubles. - Additionally, we need to buy dye to color the yarn. One pack of dye costs 30 rubles and is sufficient to dye 100 grams of yarn. - Therefore, we would need 3 packs of dye to dye 300 grams of yarn, which would cost 3 * 30 = 90 rubles. - The total cost for this option would be 350 rubles (for the yarn) + 90 rubles (for the dye) = 440 rubles.

2. Option 2: Buying Pre-Dyed Red Yarn - The price of pre-dyed red yarn is 40 rubles for 50 grams. - To obtain 300 grams of red yarn, we need to buy 6 packs of 50 grams each, which would cost 6 * 40 = 240 rubles. - The total cost for this option would be 240 rubles.

Conclusion

Comparing the two options, we find that buying the pre-dyed red yarn is cheaper. The cost for this option would be 240 rubles, while buying the yarn and dye separately would cost 440 rubles. Therefore, the cheaper option would be to buy the pre-dyed red yarn, which would cost 240 rubles.