Apple costs L rupees per kilogram for first 30kgs and Q rupees per kilogram for each additional kilogram. If the price of 33 kilograms is 333 and for 36kgs of Apples is 366 then the cost of first 15 kgs of Apples is Choose the correct choice from the following answers:
A) 3.69
B) 3.66
C) 3.6
D) 150
E) 3.61

Rationale: "ans : by framing equations we get 30 l + 3 q = 333 30 l + 6 q = 366 eliminate q by multiplying the first equation by 2 and subtracting second equation from the first 60 l + 6 q = 666 30 l + 6 q = 366 30 l = 300 = > l = 10 then we get l = 10 cost of 15 kgs of apples = 15 x 10 = 150 answer : d"
Answer: D