1. 10 peopleplete a task in 7 days. How many people are needed toplete the same task in 5 days?...

Let x be the number of people needed to complete the task in 5 days.
According to the formula: (Number of people) x (Number of days) = Constant,
10 x 7 = x x 5.
x = (10 x 7) / 5 = 14 people needed.

If 10 people can complete the task in 7 days, then the total work done is: 10 x 7 = 70 (work units).
To complete the same task in 5 days, the number of people needed can be calculated as:
70 / 5 = 14 people.

The total work done is constant, so we can use the formula: (Number of people) x (Number of days) = Constant.
10 x 7 = 70 (constant).
Therefore, to complete the task in 5 days, we need:
70 / 5 = 14 people.