Question

ABC is a straight line.

Answer 1

Answer:

AB = 20 metres

BC = 60 metres

Step-by-step explanation:

Let AB = x

Then, BC = 3x

Condition:

=> x+3x = 80

=> 4x = 80

Dividing both sides by 4

=> x = 20

So,

AB = 20 metres

BC = 3(20)

BC = 60 metres

Answer 2

The length of bc is 60 meters