Question

a road is built to connect each pair of cities. How many roads for 12 cities if each road can connect only two cities? Show your solution and step.​

Answer 1

Answer:

you correct answer is 6 roads

Step-by-step explanation:

1. in first line it state that one road is necessary to connect two cities ( each pair of city) .

2.no of cities to be connect = 12

therefore no of road = 12÷2 = 6 (roads)

3.one road can connect only two city that's why 6 roads can connect 12 city

Answer 2

Answer:

6 roads

Step-by-step explanation:

1 ROAD = 2 CITIES

2 ROAD = 2 CITIES

3 ROAD = 2 CITIES

4 ROAD = 2 CITIES

5 ROAD = 2 CITIES

6 ROAD = 2 CITIES

TOTAL = 12 CITIES