How many kg of custard powder costing Rs. 42 per kg must be mixed with 16 kg of custard powder costing Rs. 60 per kg so that 20 % may be gained by selling the mixture at Rs. 60 per kg?
A.11 kg
B.14 kg
C.12 kg
D.20 kg
FeedbackSP = 60. Gain= 20%. CP = (100/120) x 60.= CP = 50. Ratio between the 2 varieties of custard powder = 60 – 50 : 50 –42 = 10 : 8 if x is the required quantity then 10 : 8 = x : 16 ? x =20 kg.
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