Problema Solution
a child and a half can build a snowman and a half in an hour and a half. How many snowmen can two children make in three hours?
Answer provided by our tutors
1.5 child builds 1.5 snowman in 1.5 hours
if the time is fixed: the number of children is proportional with the number of snowman
if the number of snowmen is fixed: the number of children is inversely proportional to the hours
if the number of children is fixed: the number of snowman is proportional to the number of hours
1.5 *(4/3) children will build 1.5 snowman in 1.5*(1/(4/3)) hours
2 children will build 1.5 snowman in 1.125 hours
2 children will build 1.5*(3/1.125) snowmen in 1.125*(3/1.125) hours
2 children will build 1.5*(3/1.125) snowmen in 1.125*(3/1.125) hours
2 children will build 4 snowmen in 3 hours
let s be the number of snowmen built
2*3/s = 1.5*1.5/1.5
s = (6*1.5)/(1.5*1.5)
s = 4 snowmen