Question

Мастер-жестянщик может отремонтировать разбитую автомашину за 12,5 часа, а его ученик выполняет 0,03 этой же работы за 1,5 часа.Сколько времени им понадобится для совестного выполнения этой работы.

Answer 1

1/750 -производительность жестянщика

0,03/90 -производительность ученика

1/750+0,03/90=(3+25*0,03)/2250=3,75/2250=15/9000=1/600 -совместная производительность, т. е. совместно работа будет выполнена за 600 мин=10час

Answer 2

Calculation of Time Required for the Job

To calculate the time required for the master-tinsmith and his apprentice to complete the job, we need to consider the rates at which they work.

According to the information provided: - The master-tinsmith can repair a broken car in 12.5 hours. - The apprentice can complete 0.03 of the same job in 1.5 hours.

To find the time required for both of them to complete the job together, we can set up the following equation:

Time taken by the master-tinsmith + Time taken by the apprentice = Total time taken

Let's calculate the time required:

Time taken by the master-tinsmith = 12.5 hours

Time taken by the apprentice = (0.03 * 12.5) / 1.5 hours

Total time taken = Time taken by the master-tinsmith + Time taken by the apprentice

Now, let's calculate the values:

Time taken by the master-tinsmith = 12.5 hours

Time taken by the apprentice = (0.03 * 12.5) / 1.5 hours = 0.25 hours

Total time taken = 12.5 hours + 0.25 hours = 12.75 hours

Therefore, it will take the master-tinsmith and his apprentice approximately 12.75 hours to complete the job together.

Please note that the calculations provided above are based on the information given and may not reflect real-world scenarios.