Question

A trader had 630kgs of rice he sold a part of its at 15%profit and the rest at 8%profit so that he made a total profit of 12% how much rice did he sell at 8%profit

Answer 1

A trader had 630 kgs of rice he sold a part is it's at 15% profit and the rest at 8% profit so that he made a total profit of 12%

Total rice was 630 kgs and total profit was 12%
so, 630 kgs sold at 12% profit

a part of it's at 15% profit
so, x kgs sold at 15% profit

rest sold at 8% profit
so, (630 - x) kgs was sold at 8% profit

then,
630*12% = (x*15%) + ((630-x)*8%)
630*(12/100) = (15x/100) + (630*(8/100) - (8x/100)
7560 = 15x + 5040 - 8x
7560 - 5040 = 7x
7x = 2520
x = 2520/7
x = 360

x=360 kgs was sold at 15% profit and 630-x = 630-360 = 270 kgs was sold at 8% profit

at 8% profit he sold 270 kgs of rice

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