Question

"The electricity bill in UP has a component of fixed charges of Rs 1000 and the rest amount is variable depending on the units consumed at the rate of Rs 6.5 per unit. Represent the given situation as a linear equation in two variables and plot the graph. Also, interpret from the graph the amount of bill charged by UPPCL for a consummation of 920 units."

Answer 1

Answer:

ANSWER

Let the fixed amount be Rs. x and the cost of each unit be Rs. y. Then,

540y+x=1800 ...(i) and

620y+x=2040 ...(ii)

On subtracting (i) from (ii), we get 8O7=240⇒y=3

Putting y = 3 in (i), we get :

540×3+x=1800⇒x=(1800−1620)=180

∴Fixedcharges=Rs.180,Chargeperunit=Rs.3

Total charges for consuming 500units=Rs.(180+500×3)=Rs.1680

Answer 2

Answer:

ANSWER

Let the fixed amount be Rs. x and the cost of each unit be Rs. y. Then,

540y+x=1800 ...(i) and

620y+x=2040 ...(ii)

On subtracting (i) from (ii), we get 8O7=240⇒y=3

Putting y = 3 in (i), we get :

540×3+x=1800⇒x=(1800−1620)=180

∴Fixedcharges=Rs.180,Chargeperunit=Rs.3

Total charges for consuming 500units=Rs.(180+500×3)=Rs.1680