A shopkeeper purchased 40 kg of rice at the rate of 6.75 per kg and
mixed it with 60 kg of rice, purchased at 8 per kg. At what rate (per
kg) must he sell the mixture to gain 20% profit?
please tell stepwise
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Answer:
40 kg - 6.75
= ₹ 270
60 kg - 8.00
= ₹ 480
10 kg - ₹ 750
750 = total amount ( 100 % )
20% profit = 100 % + 20 %
= 120 %
100 : 120 : : 750 : x
product of means = product of extremes
100 × x = 120 × 750
100x = 90,000
x = 90,000 / 100
( 0 , 0 cancel )
x = 900
( 60 + 10 kgs of rice should be sold at ₹ 900 ) with the rate of ₹ 12.86
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