A) Rs.28.25 per kg
B) Rs.13.25 per kg
C) Rs.8.25 per kg
D) none of these
Correct Answer: C
Solution :
C.P. of 200 kg of rice \[=\frac{40}{3}\times 15=200m.\] C.P. of 400 kg of rice \[=60\times \frac{5}{18}=\frac{50}{3}m/\sec .\] Total C.P. of 600 kg of mixture \[~=\left( 140\text{ }+\text{ }260 \right)m=400\text{ }m\] Profit required on whole outlay = 20% \[=\frac{400}{50/3}\] S.P. must be \[=400\times \frac{3}{50}=24\sec .\] Now, one third of mixture \[=\frac{45-36}{45}hr\] S.P. of this 200 kg of mixture \[=\frac{9}{45}hr=\frac{1}{5}\times 60=12\min .\] S.P. of remaining 400 kg \[\therefore \] \[20\times 2.40=Rs.48\] Rate of selling the remaining \[400\times \frac{110}{100}\times \frac{110}{100}=484\]
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