Question

In a new budget, the price of petrol rose by 10%. By how much percent must one reduce the consumption so that the expenditure does not increase?.................. Answer fast.... w(°ｏ°)w​

Answer 1

Answer:

Your consumption should be 90.9 per cent of what it used to be before the prices rose. In other words, your consumption should reduce by 9.1 percentage points. (This is different from percentage!)

Step-by-step explanation:

Let us assume you used y litres of petrol when the price was Rs.x per litre. Your total expenditure was "xy"

Now the price of petrol is 10 per cent more, which means it has become 1.1x. Let your new consumption (after the price rise) be N. Then we have:

1.1x * N = xy

N = y/1.1

N = 0.909*y

This means that your new consumption should be 0.909 times of what it was or 90.9 per cent of what it was

Answer 2

Let the original price of petrol be equal to 100 rupees

Then the price after 10% increase is equal to 100+10%of100

100+10/100*100

=110

Price after 10% increase=110

{(110-100)/110}*100

=100/11

=9.09%

A motorist should reduce the consumption of petrol by

9. 09%...