How many kilogram of sugar costing Rs. 9 per kg must be mixed with 27 kg of sugar costing Rs. 7 per kg so that there may be a gain of 10% by selling the mixture at Rs. 9.24 per kg?

How many kilogram of sugar costing Rs. 9 per kg must be mixed with 27

1.	How many kilogram of sugar costing Rs. 9 per kg must be mixed with 27 kg of sugar costing Rs. 7 per kg so that there may be a gain of 10% by selling the mixture at Rs. 9.24 per kg?
A.	42 kg
B.	36 kg
C.	63 kg
D.	54 kg
Answer» D. 54 kg