Q. 45.0( 2 Votes )

The cost of the m

Answer :

(i) k = 15 (ii) ₹45


Let the cost of milk be Y and X be the quantity of milk in liter. As it’s given that cost per one liter is 15rs so increase in quantity will increase the cost of milk. So it’s a direct proportion


Mathematically,


Y = KX


Where K is the constant of proportionality


So we can draw a table



so from the graph it’s clear that y = kx = 15x


Proportionality, k = 15


We can draw a graph using the table given



To find the cost of 3 liter milk we have to draw a line parallel to Y-axis at X = 3 then from the intersection point of that parallel line and the curve draw another line parallel to X-axis so the point of intersection of that line and Y-axis will give the cost of 3 liter of milk.


From the graph its clear that cost of 3 liter is 45 RS.


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