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8 is the answer . Since half a kg is 500g, 100 g would cost 1/5 as much. 1/5 of 40 is 8.
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2.2 POUNDS
To find the cost of 250g at $4.80 per kg, we first convert 250g to kg by dividing by 1000 (since 1 kg = 1000g). This gives us 0.25 kg. Next, we multiply 0.25 kg by $4.80 to find the total cost, which is $1.20.
If 1/2 costs 14p . Find the cost of 1 1/2 kg