Question

На стройку в первый день привезли 15% требуемых материалов, а во второй день - 30% оставшегося количества. Сколько процентов всех материалов осталось ещё привезти?​

Answer 1

Ответ:

59,5%

Пошаговое объяснение:

На второй день осталось 1-15/100=0,85 всего количества

После второго дня  осталось 0,85*(1-30/100)=0,85*0,7=0,595 всего  количества.

Значит ответ 59,5%

Answer 2

Calculation of Remaining Materials to be Delivered

To calculate the percentage of materials that still need to be delivered, we can follow the given information:

- On the first day, 15% of the required materials were delivered. - On the second day, 30% of the remaining quantity was delivered.

To find the remaining percentage of materials, we need to calculate the cumulative percentage of materials delivered on both days.

Let's assume the total required quantity of materials is 100 units.

- On the first day, 15% of 100 units were delivered, which is 15 units. - On the second day, 30% of the remaining quantity (85 units) was delivered, which is 25.5 units.

The total quantity of materials delivered so far is 15 + 25.5 = 40.5 units.

To find the remaining percentage of materials, we subtract the delivered quantity from the total required quantity and calculate the percentage:

Remaining quantity = Total required quantity - Delivered quantity Remaining quantity = 100 units - 40.5 units = 59.5 units

Remaining percentage = (Remaining quantity / Total required quantity) * 100 Remaining percentage = (59.5 units / 100 units) * 100 = 59.5%

Therefore, approximately 59.5% of all materials still need to be delivered.