question_answer

How many kilogram of sugar costing Rs 5.50 per kg must be mixed with 60 kg of sugar costing Rs 4.80 per kg, so that the mixture is worth Rs 5.25 per kg?

A)  90 kg         

B)  95 kg

C)  108kg        

D)  106kg

Correct Answer: C

Solution :

Using the rule of Alligation Now, \[\frac{0.25}{0.45}=\frac{5}{9}\] \[\therefore \] \[\frac{5}{9}=\frac{\text{60}}{\text{Superior}\,\text{sugar}}\] \[\therefore \] Quantity of superior sugar \[=\frac{60\times 9}{5}=108\,\text{kg}\]