The average height of 3 girls is 180 cm. If the ratio of their heights is 4 : 5 : 6, then find height of smallest girl.
1
48 cm
2
44 cm
3
144 cm
4
142 cm
The average height of 3 girls is 180 cm. If the ratio of their heights is 4 : 5 : 6, then find height of smallest girl.