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Garden shears
Steel: the shears have 0.4 kg of high quality steel in the final product. The manufacturing process loses 5% of all steel put in . Steel costs $4000 per tonne ( 1 tonne = 1000kg)This was an extract from a past year question in june 2010 and the answer was like this :
(0.4/0.95)$4.00= $1.68. So, sir what i would like to ask u is: what if i used this way =0.4kg*0.95*$4= $1.52 so what makes difference for these two method? Can u give a simple way to understand for these two scenarios ?n
For every 100kg they buy, they will lose 5% x 100 = 5kg, and will therefore only be able to use 96kg in the product.
Putting it the other way round, for every 95kg they need for production they will have to buy 100 kg.
Therefore if they need 0.4kg for production they will need to buy 100/95 x 0.4 kg.
Do watch my free lectures, because I do go through some examples like this.
The lectures are a complete free course for Paper F5 and cover everything needed to be able to pass the exam well.
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