Question

Case study
In any metropolitan city, The Board of Water Works collects water bill based on the consumption of water.
In a metropolitan
city A, the bill consists a fixed cost of Rs.100 per
month and a variable cost per kilo litre:In
another metropolitan city B, the bill consists a fixed cost of Rs. 80 per month and a variable cost per kilo litre.
(i) If a consumer from the city A gets a water bill of Rs.310 in a month for consuming 21 kilo litres of water, what
is the cost of water per kilo litre (in Rs.)?
(a) 8
(b) 9
(C) 10
(d) 12​

Answer 1

Answer:

C-10

Step-by-step explanation:

because cost is fixed ®100

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