Answer:

The total monthly expenditure of the family when the cost of wheat is 950 per quintal is Rs. 5850

Step-by-step explanation:

Let the constant monthly expenditure be Rs.'x' and the amount of wheat they buy be 'y' Quintal

We KNOW that,

Monthly expense (constant) + (Rate × amount of wheat) = Total monthly expenditure

Now, According to the Question,

Case 1

x + 800y = 5400 ----- 1

Case 2

x + 1000y = 6000 ------ 2

Let's Subtract eq.1 from eq.2, we get,

x + 1000y = 6000

– x + 800y = 5400

————————————

0 + 200y = 600

————————————

y = 600/200 = 3

Putting y = 3 in eq.2 we get,

x + 1000(3) = 6000

x = 6000 - 3000 = 3000

Thus, the family has a monthly expense of

Rs.3000 and then buy's additional 3 Quintals of wheat

Now, If the rate of wheat COMES to Rs.950 per Quintal

then the family's total monthly expenditure = 3000 + 950(3) = 3000 + 2850 = Rs. 5850

Thus, the total monthly expenditure of the family when the cost of wheat is 950 per quintal is Rs. 5850

Hope it HELPED and you understood it........All the best