00:01
So, in this question we are given f1 equals to 10 centimeter, f2 equals to 15 centimeter, du equals to minus 60 centimeter, d equals to 30 centimeter and h0 equals to 5 centimeter.
00:19
So, now in a part of the question, first we will draw the figure.
00:22
So, this is our length and this is our length 1, this is our length 2 and from here, so we know the formula that v equals to u multiplied by f divided by u plus f.
00:39
So, this will be equals to minus 60 multiplied by 10 and divided by minus 60 plus 10 and this will be equals to plus 12 centimeter.
00:49
So, this is the answer for part a.
00:53
Now in part b of the question, for second u will be equals to minus 30 minus 12, this is equals to minus 18 centimeter and f2 is 15 centimeter...