The average height of children in a kindergarten is 1 15cm, among which boys are more than girls, and girls are taller than boys 10%. What is the average height of the boys in this class?

Navigation: There are no figures for boys and girls in the question. We can assume that there are five girls and six boys.

① Total height:115× [5+5× (1+)] =1265 (cm).

(2) because the average height of girls is that of boys (1+ 10%=), the height of five girls is equivalent to (5×=)5.5 boys, so the average height of boys is:

1265 ÷ [(1+10%) × 5+6] =110 (cm)

Answer: The average height of boys in this class is 1 10 cm.