Profit and Loss Practice Test 4

Question : 20 of 40

Marks: +1, -0

If the price of petrol is increased by 20%, by what percentage should the consumption be decreased by the consumer if the expenditure on petrol remains unchanged?

$16 2/3%$
$6 2/3%$
8%
15%
None of these

Validate

Solution:

\table \Price ,\Quantity ,\Expenditure;x, y ,xy;6/5x,y-{y×3}/100,xy

{6x}/5(y-{yz}/100)=xy

{6xy}/5-{6xyz}/500=xy

6/5-{3z}/250=1

z=1/5×250/3=50/3=16 2/3%

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