Question

8 бульдозеров расчистили площадку за 260 минут. За какое время расчистят эту же площадку 13 бульдозеров?

Answer 1

260*8=2080
2080:13=160 мин.

Answer 2

To solve this problem, we can use the concept of "work" and "time." The work done to clear the area remains the same, so we can set up a proportion to find the time required with 13 bulldozers.

Let's assume the work required to clear the area is W (constant) and the time taken by 8 bulldozers to clear the area is T1. The time taken by 13 bulldozers to clear the same area is T2 (what we need to find).

According to the problem, the number of bulldozers and the time taken are inversely proportional to each other:

Number of bulldozers ∝ 1 / Time taken

Mathematically, this can be expressed as:

8 / T1 = 13 / T2

Now, let's find T2:

T2 = (13 * T1) / 8

We know T1 = 260 minutes (time taken by 8 bulldozers), so we can plug in the value:

T2 = (13 * 260) / 8 T2 = 33.125 minutes

So, 13 bulldozers will clear the same area in approximately 33.125 minutes.