Question

B. (i) Every six months, price of petrol
increases at the rate of rupees 6 per litre.
Taking price of petrol in December, 2011
as x and present price of petrol as y, form
a linear equation sharving amount spent
on petrol in December, 2012.
(ii) Due to continuous rise in the petrol price:
people are shifting towards CNG whose
price increases at the rate of 4 per litre
in a year. Form a linear equation taking
price of CNG in December 2011 as a and
in December 2012 as b.​

Answer 1

Answer:

i) y-x=12 or, x-y=(-12)

ii)b-a=8 or, a-b=(-8)