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the cost of 1/5 kg= 22(1/2)=45/2
so,the cost of 1 kg = 45/2÷1/5
= 45/2×5/1
=225/2
now,
the cost of 2(1/2) ie 5/2 =225/2×5/2
=625/2=312(1/2)
so,the cost of 1 kg = 45/2÷1/5
= 45/2×5/1
=225/2
now,
the cost of 2(1/2) ie 5/2 =225/2×5/2
=625/2=312(1/2)
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