Apple costs X rupees per kilogram for first 30 kgs and Y rupees per kilogram for each additional kilogram. If the price of 40 kilograms is 420 and for 50 kgs of Apples is 540 then the cost of first 10 kgs of Apples is
Pick
A) 100
B) 3.66
C) 3.6
D) 3.62
E) 3.61
100ns: By framing equations we get   30X+10Y=420   30X+20Y=540   Eliminate Q by multiplying the first equation by 2 and subtracting second equation from the first   60x+20y = 840 -   30x+20y = 540   =&gt; 30x = 300 =&gt; x = 10   Then we get X = 10   Cost of 10 kgs of apples = 10x 10 = 100   100nswer:100
<result>A</result>
Apple costs X rupees per kilogram for first 30 kgs and Y rupees per kilogram for each additional kilogram. If the price of 40 kilograms is 420 and for 50 kgs of Apples is 540 then the cost of first 10 kgs of Apples is