Answer:
Ava = 1.12 m tall
Olivia = 0.89 m tall
Explanation:
given;
Ava is 23cm taller then Olivia,
Olivia is half the height of Lucas.
If Lucas is 1.78m tall
find:
how tall are Ava and Olivia
-------------------------------------
Ava = Olivia + 0.23
Olivia = Lucas / 2
Lucas = 1.78
plugin values into the equation above
Olivia = 1.78 / 2 =
Olivia = 0.89 m tall
Ava = 0.89 + 0.23
Ava = 1.12 m tall