Question

ABC is a straight line. The length AB is five times the length BC . AC= 90CM. Work out the length AB

Answer 1

AB = 75cm

Explanation:

Let BC equal x. Then AB is 5x because it is 5 times as long.

The whole length is 90, that was given.

Add the pieces, 5x and x, and set them equal to 90.

Solve the equation. See image. Last, calculate AB.

see image.