a. After every 6 months, price of petrol increases at the rate of Rs 4 per litre. Taking price of petrol in December 2010 as x and present price of p etrol as y, form a linear equation showing the price of petrol in December 2014.
b. Due to continuous rise in the price of petrol, p eople are more interesting in CNG whose price is increasing at the rate of Rs 3 per litre i n a year. Form a linear equation taking price of CNG in December 2010 as a and in December 2014 as b .

Dear Student,
Please find below the solution to the asked query:

iAs price of petrol increases by  4 in every 6 months, hence it increases by 8 every year.Now duration from December 2010 to December 2014 is 4 years.Increase in price in one year= 8Increase in price in four year= 8×4=32Price in December 2010= xPrice in December 2014= yy=x+32 , where x and y are in .iiAgain duration from December 2010 to December 2014 is 4 years.Increase in price in one year= 3Increase in price in four year= 3×4=12Price in December 2010= aPrice in December 2014= bb=a+12 , where a and b are in .

Hope this information will clear your doubts about this topic.

If you have any doubts just ask here on the ask and answer forum and our experts will try to help you out as soon as possible.
Regards

  • 14
a) equation for petrol will be
y=x+32

b) equation for CNG will be
b=a+12
  • -1
What are you looking for?