Question

Бригада должна отремонтировать 800 м дороги. В первую неделю было отремонтировано 30% всей дороги, во вторую 20% остатка. Сколько метров дороги было отремонтировано за 2 недели? Помогите, пожалуйста!

Answer 1

1) 800:100*30=240м
2)800-240=560
3)560:100*20=112
4)240+112=352

Answer 2

800:100=8
8*30=240
800-240=560
560:100=5,6
5,6*20=112
240+112=352

Answer 3

Calculating Road Repair Progress

To calculate the total distance of the road repaired over two weeks, we can follow these steps:

1. Calculate the distance repaired in the first week: - 30% of the total distance of the road was repaired in the first week. 2. Calculate the distance repaired in the second week: - 20% of the remaining distance was repaired in the second week. 3. Add the distances repaired in the first and second weeks to find the total distance repaired over two weeks.

Let's proceed with the calculations.

Calculation

1. Distance Repaired in the First Week: - 30% of 800m = 0.30 * 800m = 240m

2. Remaining Distance after the First Week: - 800m - 240m = 560m

3. Distance Repaired in the Second Week: - 20% of 560m = 0.20 * 560m = 112m

Total Distance Repaired over Two Weeks

Adding the distances repaired in the first and second weeks: - 240m + 112m = 352m

Therefore, the total distance of the road repaired over two weeks is 352 meters.