00:01
Hello students, let us discuss the solution of this question.
00:03
The perimeter of a rectangle is given to be equal to 390 meters.
00:08
We have to express the area a as a function of l.
00:12
So let us discuss the solution of this question.
00:14
We know that the perimeter of rectangle meter of rectangle is equal to 2 into l plus b, where l is the length and d.
00:38
B is the width.
00:43
Area a of the rectangle is given by l multiplied by b, where l is the length and b is the width.
00:55
So perimeter, it is given in the question that it is 390 meter.
01:01
So 2 into l plus b is equal to 390 meter.
01:06
L plus b is equal to 390 divided by 2, which gives us the answer as 10095.
01:24
Now, b is equal to 195 subtracted by l.
01:31
So we have b is equal to 195 minus l.
01:38
Now the area a is equal to l multiplied with b, which is equal to l multiplied by 195 minus l, which is equal to 195 l minus l raised to 2...