The average height of 3 girls is 1.54 m. Naina is 4 cm taller than Joyce snd 4 cm shorter thsn Adila. Find Joyce's height. Give your answer in metres.

Answer 1

Let x be Joyce's height.

Naina's height = x + 4 cm
Adila's height = x + 4 cm - 4 cm = x cm

Average height = (x + (x + 4) + x)/3 = 1.54 m
3x + 4 = 4.62
3x = 0.62
x = 0.62/3
x = 0.20666666667 m
Joyce's height = 0.21 m