Question

Один грузовик может вывезти с поля 840 т зерна за 60 ч,а другой-тот же груз за 84 ч. Сколько потребуется времени при совместной работе обоих грузовиков ?

Answer 1

1)840:60=14(т/ч)-производительность первого грузовика.
2)840:84=10(т/ч)-производительность второго грузовика.
3)14+10=24(т/ч)-общая производительность.
4)840:24=35(ч)-часов для совместной работы.
Ответ:при совместной работе обоих грузовиков потребуется 35 часов.

Answer 2

1) 840:60=14(т) - за 1 час 1 грузовик
2) 840:84= 10(т) - за 1 час 2 грузовик
3) 840 : (14+10) = 35 часов при совместной работе потребуется
Ответ:35ч

Answer 3

Problem Analysis

We are given two trucks that can transport 840 tons of grain each. The first truck takes 60 hours to transport the grain, while the second truck takes 84 hours. We need to determine how long it will take for both trucks to transport the grain together.

Solution

To find the time it takes for both trucks to transport the grain together, we can use the concept of work. The work done by each truck is the product of the weight of the grain and the time taken to transport it.

Let's denote the time taken by the first truck as t1 and the time taken by the second truck as t2. The work done by the first truck is 840 tons multiplied by t1, and the work done by the second truck is 840 tons multiplied by t2.

Since the work done by both trucks together is equal to the total work, we can write the equation:

840 * t1 + 840 * t2 = 840

Simplifying the equation, we get:

t1 + t2 = 1

Therefore, the time taken for both trucks to transport the grain together is 1 hour.

Answer

It will take 1 hour for both trucks to transport the grain together.

Note: The sources provided do not contain specific information related to this problem. Therefore, the solution is derived based on the given problem statement and mathematical reasoning.