00:01
Here, in this question, all these informations are given and we are required to find the interest rate when the government spending will fall to 420 and the investment will rise by 80.
00:35
Now, as we know that these informations are given, we can easily find out y.
00:42
So, y will be 2000.
00:48
Now, consumption function is given.
00:57
C is equal to 0 .6 multiplied by y minus t.
01:15
So, let's put the value of t in this equation which is 0 .25y.
01:30
So, the value of c will be 0 .45y.
01:44
Y is equal to c plus i plus g.
01:52
Value of c is 0 .45y.
01:58
I is 1000 minus 40r.
02:11
This part is already given in question and g is unknown.
02:23
So, zy is equal to 2000.
02:32
0 .5 multiplied by 2000.
02:43
G minus 100 by 40.
02:50
After solving this, r will be g minus 100 divided by 40.
03:03
We know the value of g as it is also given in question...