Q: The length of a rod is 0.45m. It expands to a length of 0.47m. Find the expansion as a percentage of its original length. ??? Please help if possible.
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$\displaystyle \frac{\text{initial length}}{\text{final length}}=\frac{0.45}{0.47} = 95.745 \%$
It seems too simple, thanks though!
I think percentage increase in length =[change in length/orig. length] X100 so, it should be=[0.02/0.45] X 100 am I correct??
Ans- 4.44%
Thank you so much sumit2009, you've just confirmed the answer for me. I thought it was 4.44% nice one!
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