The weights of 4 boxes are 70, 50, 30 and 90 kilograms. Which of the following cannot be the total weight,in kilograms, of any combination of theseÂ boxes and in a combination a box can be used only once?

The weights of 4 boxes are 70, 50, 30 and 90 kilograms. Which of the f

1.	The weights of 4 boxes are 70, 50, 30 and 90 kilograms. Which of the following cannot be the total weight,in kilograms, of any combination of theseÂ boxes and in a combination a box can be used only once?
A.	220
B.	240
C.	210
D.	170
Answer» B. 240