Question

Один токарь каждый час изготавлевал 8 деталей а другой 7 деталей в час за сколько часов они изготовят вместе 90 деталей Если выработка не меняется в час у них не изменяется

Answer 1

8+7=15 деталей за час изготавливают вместе,
90:15=6 -за 6 часов они изготовят вместе 90 деталей,
при этом токарь который изготавливает 7 деталей в час сделает (7*6) 42 детали, а тот, который изготавливает 8 деталей в час сделает (8*6) 48 деталей. (48+42=90)

Answer 2

Узнаем сколько они изготовят вместе за час: 7+8=15
Узнаем, за сколько они изготовят 90 деталей: 90:15=6 часов.

Answer 3

Problem Analysis

We have two lathe workers, one producing 8 parts per hour and the other producing 7 parts per hour. We need to determine how many hours it will take for them to produce a total of 90 parts together.

Solution

To find the number of hours it will take for the two lathe workers to produce 90 parts together, we can set up an equation based on their individual production rates.

Let's assume it takes x hours for them to produce 90 parts together.

The first lathe worker produces 8 parts per hour, so in x hours, they will produce 8x parts.

The second lathe worker produces 7 parts per hour, so in x hours, they will produce 7x parts.

Together, they will produce a total of 90 parts, so we can set up the equation:

8x + 7x = 90

Simplifying the equation:

15x = 90

Dividing both sides by 15:

x = 6

Therefore, it will take them 6 hours to produce 90 parts together.

Answer

If the two lathe workers continue to produce at their respective rates of 8 parts per hour and 7 parts per hour, it will take them 6 hours to produce a total of 90 parts together.