00:02
Students, here in this question, we are given with the rolls of file which have a width of 307 millimeter.
00:18
So let us make one thing clear.
00:20
Let us convert all the units in centimeter and the mass units in grams.
00:27
So let us convert it into centimeter.
00:29
It is 30 .7 centimeter.
00:32
As we know that, one centimeter is one centimeter is.
00:35
Equals to 10 m m now we know the thickness of rolls right so we know the thickness of rolls so if you see the roll it is a roll okay and it is given to us as 0 .016 m that is millimeter but now if you see the thickness so you have you know one file here and like this okay so assuming that there is no space between them so the thickness of the file which is from here to here this thickness we have to take the radius assuming that the space is negligible.
01:19
So this we have to take.
01:21
So what we will do is we will just divide it by 2 .016 divide by 2.
01:27
We get the thickness of sheet which is 0 .008 mm.
01:33
Now as i said we have to convert the length unit in centimeters unit so this will be 0 .008 centimeter keeping this in mind now moving forward we are also given with density and density is given to us as 2 .7 gram per centimeter cube so here mass is given in grams and length unit is in centimeter so we we don't need to convert it.
02:06
Now we are given with the total mass of the material which is 1 .31 kg.
02:18
Now we need it into grams.
02:20
So we know that 1 kg is equals to 1 ,000 grams.
02:26
So keeping this in mind we will get to know that it is 1310 grams.
02:31
So we have this mass and in the question they are asking.
02:35
That what will be the length of foil which can be made using this mass of the foil...