Use the formula Strain=Extension/original length and rearrange to give Original length=Extension/Strain. Substitute the values you have for the strain and the extended length into the equation and voila! Source: Doing A-level (senior high-school in America) Maths and Physics.
You cannot.
By dividing length times width into its given volume
That will depend on the information given as for example if you are given its width and area then in order to find its length divide the width into the area.
The answer will depend on what other information is given.
Extension is the Displacement. Load N 0 1 2 3 4 5 Lenth MM 30 38 45 58 64 89 Ext MM 0 8 15 18 34 59
Use the formula Strain=Extension/original length and rearrange to give Original length=Extension/Strain. Substitute the values you have for the strain and the extended length into the equation and voila! Source: Doing A-level (senior high-school in America) Maths and Physics.
Find the width, and multiply the length and the width.
double the length
You cannot.
By dividing length times width into its given volume
Divide it by 100.
29
18
You cannot
That will depend on the information given as for example if you are given its width and area then in order to find its length divide the width into the area.
Area divided by width equals length