Question

Помогите прошу :( Для радиофикации помещения приобрели 1200 м про-волоки.12 мотков про-волоки,по 60 м в каждом мотке,израсходовали на внутреннюю проводку,а (три пятых) оставшейся проволоки пошло на внешнюю проводку. Сколько проволоки пошло на внешнюю проводку?

Answer 1

1). 60*12=720 (м) израсходовали на внутреннюю проводку; 2). 1200-720=480 (м) остаток; 3). 480:5*3=288 (м) израсходовали на внешнюю проводку.

Answer 2

Calculating the Amount of Wire Used for External Wiring

To calculate the amount of wire used for external wiring, we can use the information provided:

- Total length of wire purchased: 1200 m - Number of coils of wire: 12 - Length of wire in each coil: 60 m - Amount of wire used for internal wiring: 12 coils

Let's calculate the amount of wire used for external wiring.

Calculation

First, we need to find the total length of wire used for internal wiring: \[ \text{Total length of wire used for internal wiring} = \text{Number of coils for internal wiring} \times \text{Length of wire in each coil} \]

\[ \text{Total length of wire used for internal wiring} = 12 \times 60 \] \[ \text{Total length of wire used for internal wiring} = 720 \, \text{m} \]

Next, we can calculate the amount of wire used for external wiring: \[ \text{Total length of wire used for external wiring} = \text{Total length of wire purchased} - \text{Total length of wire used for internal wiring} \]

\[ \text{Total length of wire used for external wiring} = 1200 - 720 \] \[ \text{Total length of wire used for external wiring} = 480 \, \text{m} \]

Answer

The amount of wire used for external wiring is 480 meters.