Question

i have a bike.once a day i put a fuel which cost 500.how much money i will spent on my fuel each month.

Answer 1

Months with 30 days - 500x30=15000
Months with 31 days - 500x31=15500
February - 500x28=14000

Answer 2

cost of  fuel for one day=500
cost of fuel for 1 month=500*30(if the month has 30 days)
                                   =15000
  (or)
cost of fuel for 1 month =500*31(f the month has 31 days)
                                     =15500