A stick has a length of 12.132cm and another stick has a length of 12.4cm.If the two sticks are placed end to end, what is their total length? If the two sticks are placed side by side , what is the difference in their lengths?

A stick has a length of 12.132cm and another stick has a length of 12.

1.	A stick has a length of 12.132cm and another stick has a length of 12.4cm.If the two sticks are placed end to end, what is their total length? If the two sticks are placed side by side , what is the difference in their lengths?
Answer» Solution :Let lengths of the STICKS are named as `l_(1)=12.132cm, l_(2)=12.4cm` Here `l_(2)`has one decimal place and `l_(1)`has to be ROUNDED off t o have only TWO decimal places `l_(1)+l_(2)=12.13+12.4=24.53`. This is to be rounded off to have one decimal place only. `:.` The total length is` 24.5cm` `l_(1)=12.132, l_(2)=12.4`. ` l_(1)-l_(2)=12.4-12.132` Here `12.4`has only decimal place and hence `12.132`should have only two decimal places. `:.l_(1)-l_(2)=12.4-12.13=0.27` this should be rounded off to have only one decimal place . `:.l_(1)-l_(2)=0.3` Hence difference of their lengths is `0.3`CM