Sonu buys 40 kg of wheat at Rs.12.50 per kg and 30 kg of wheat at Rs.14 per kg. At what rate per kg should he sell the mixture to gain 5% on the whole?
CP of total wheat = 40 × 12.50 + 30 × 14
= 500 + 420
= Rs.920
Total Weight of Wheat = 40 kg + 30 kg
= 70 kg
= Rs.966
So, to gain 5% on wheat SP will be Rs.966
Rate for 1 kg wheat = 966/70
= Rs.13.80
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