Question

Слесарь изготовил 84 детали.первые два часа он изготавливал по 15 деталей с час,а потом начал изготовлять по 18 деталей в час.сколько времени ушло на изготовление всех деталей?

Answer 1

1)15*2 =30
2)84-30=54
3)54/18=3
4)3+2=5
Ответ: 5 часов было потрачено на изготовление 84 деталей

Answer 2

Ушло 5 часов. 
15+15=30
18+18+18=54
30+54=84

Answer 3

Calculating Time Taken to Make Parts

To calculate the time taken to make all the parts, we can use the following steps:

1. Calculate the time taken to make the first set of parts. 2. Calculate the time taken to make the second set of parts. 3. Add the times together to find the total time taken.

Let's proceed with the calculations.

1. Time taken to make the first set of parts: - The worker made 15 parts in the first 2 hours. - This means the worker made 15/2 = 7.5 parts per hour for the first 2 hours. - Therefore, the time taken to make the first set of parts is 15/7.5 = 2 hours.

2. Time taken to make the second set of parts: - The worker made 18 parts per hour after the first 2 hours. - Let's assume the worker took x hours to make the remaining parts. - The number of parts made in the remaining time is 18x.

3. Total time taken: - Adding the time taken for the first set of parts and the time taken for the second set of parts gives the total time taken to make all the parts. - Therefore, the total time taken is 2 + x hours.

Now, we need to solve for x to find the total time taken to make all the parts.

Let's solve for x using the given information.