Question

Люди помогите решить задачку а то я в этом тютю За четыре недели было отремонтировано 156км дороги. За одну неделю было отремонтировано 4/13 дороги, а за вторую неделю- 7/36 остатка, за третью неделю в два раза больше чем за вторую неделю. Сколько км дороги отремонтировали за четвёртую неделю? Помогите плиз дам 32 бала

Answer 1

В первую неделю отремонтировали 156 * 4/13 = 12 * 4 = 48км
Остаток: 156 - 48 = 108км
За вторую неделю: 108 * 7/36 = 3 * 7 = 21км
Остаток после второй недели: 108 - 21 = 87км
За третью неделю отремонтировали: 21 * 2 = 42км
Остаток после третьей недели и одновременно с этим ответ: 87 - 42 = 45км дороги отремонтировали за 4 неделю.

Answer 2

To solve this problem, let's break it down step by step.

Given Information:

- Total distance of road repaired in four weeks: 156 km - Distance of road repaired in the first week: 4/13 of the total distance - Distance of road repaired in the second week: 7/36 of the remaining distance after the first week - Distance of road repaired in the third week: twice the distance repaired in the second week

Step 1: Calculate the distance repaired in the first week

To find the distance repaired in the first week, we need to calculate 4/13 of the total distance. Let's calculate it:

4/13 * 156 km = 48 km

So, the distance repaired in the first week is 48 km.

Step 2: Calculate the distance repaired in the second week

To find the distance repaired in the second week, we need to calculate 7/36 of the remaining distance after the first week. Let's calculate it:

Remaining distance after the first week = Total distance - Distance repaired in the first week Remaining distance = 156 km - 48 km = 108 km

7/36 * 108 km = 21 km

So, the distance repaired in the second week is 21 km.

Step 3: Calculate the distance repaired in the third week

To find the distance repaired in the third week, we need to calculate twice the distance repaired in the second week. Let's calculate it:

2 * 21 km = 42 km

So, the distance repaired in the third week is 42 km.

Step 4: Calculate the distance repaired in the fourth week

To find the distance repaired in the fourth week, we need to subtract the sum of distances repaired in the first three weeks from the total distance. Let's calculate it:

Total distance - (Distance repaired in the first week + Distance repaired in the second week + Distance repaired in the third week) 156 km - (48 km + 21 km + 42 km) = 45 km

So, the distance repaired in the fourth week is 45 km.

Therefore, the distance of road repaired in the fourth week is 45 km.

I hope this helps! Let me know if you have any further questions.