Saved Bookmarks
| 1. |
A stick has a length of l12.132 cm and another stick has a length of 12.4 cm. (a) If the two sticks are placed end to end, what is their total length ? (b) If the two sticks are placed side by side, what is the difference in their lengths ? |
|
Answer» Solution :(a) Let lengths of the sticks ARCE named as `I_(1)= 12.132cm. I_(2) = 124 CM ` Here `I_(2)` has one decimal place and `I_(1)`has to be rounded off to have only two decimal places `I_(1)+I_(2)=12.13+12.4=24.53` This is to be rounded off to have one decimal place only. This is to be rounded off to have one decimal place only. The total length is 24.5cm (b) `I_(1)=12.132 , I_(2) = 12.4 . I_(1) -I_(2)=12.4 -12.132` Here 12.4 has only decimal place and hence 12.132 should have only two decimal places. `:. I_(1)-I_(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 |
|