Question 391144
at the beach 4 children working separately made 8 sandcastles in an hour.
:
Find the rate of castle building in child-hrs (one child working 1 hr)
4 child-hrs made 8 castles
{{{8/4}}} = 2 castles per child-hr
:
at this rate, how many sandcastles can 12 children make in 1/2 an hour.
.5*12*2 = 12 castles in 1/2 hr by 12 children