Sharad bought 36 kg of sugar at the rate of Rs. 45 per kg and 24 kg more at the rate of Rs. 40 per kg. He mixed these two varieties and sold the mixture at 20% profit. At what rate per kg did he sell the mixture of sugar ?
Total C.P. of 60 kg of sugar
= Rs. $$(36 \times 45 + 24 \times 40)$$
= Rs. $$(1620 + 960)$$ = Rs. $$2580$$
Total S.P. = $$2580 \times \frac{120}{100}$$
= Rs. $$3096$$
$$\therefore$$ S.P. per kg = $$\frac{3096}{60}$$
= Rs. $$51.60$$
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