SOLUTION: Hi the mass of a box is 45kg when full.when half of the items are taken out the mass of the remaining items and the box is 33kg. What is the mass of the empty box. thanks

Algebra ->  Customizable Word Problem Solvers  -> Misc -> SOLUTION: Hi the mass of a box is 45kg when full.when half of the items are taken out the mass of the remaining items and the box is 33kg. What is the mass of the empty box. thanks      Log On

Ad: Over 600 Algebra Word Problems at edhelper.com


    

Question 1098052: Hi
the mass of a box is 45kg when full.when half of the items are taken out the mass of the remaining items and the box is 33kg. What is the mass of the empty box.
thanks
Answer by Theo(13342) About Me  (Show Source):
You can put this solution on YOUR website!
mass is 45 kg when full.
mass is 33 kg when half full.

half the contents of the box must therefore weigh 45 - 33 = 12 kg.

this means all the contents of the box must therefore weigh 2 * 12 = 24 kg.

the empty box must therefore weigh 45 - 24 = 21 kg.