Question

the rate of minimum 20 units of electricty is rs 80.the rate of 21-250 units of electricity is rs 7.30 per unit. if with 10% additional amount rs. 1292.50 is to be paid .how much unit is utilized​

Answer 1

Answer:

168.39

Step-by-step explanation:

amount to be paid = rs. 1292.5

10 % of rs 1292.5 is 129.25

I.e, electricity bill is rs. (1292.5-129.25) = rs. 1163.25

let the amount of electricity of 21-250 unit is x

so total amount to be paid is 80( for min. 20 units) + 7.3x

which is equal to 1163.25.

so just solve 80 + 7.3x = 1163.25 which gives x = 148.39

so total unit utilized = 20 + 148.39 = 168.39 units