Question

Sonu buys 40kgs of wheat at rs12.50 per kg and 30kg of wheat at rs14 per kg at what rate per kg should he sell the mixture to gain 5percent on the whole

Answer 1

40 kg of wheat at rupees 12.50 per kg=40×12 .50=500
30 kg of wheat at Rs 14 per kg=30× 14=420
total CP=500+420=920
gain=5%
s p=100+5%/100×cp
s p =100+5%/100×920
sp=105%/100=920
sp=21/20=920
sp=21/46
sp=21×46
sp=966
per kg=40+30
per kg=70
966÷70=13.8