Question

A car owner buys diesel at rs 7.50, rs 8, rs 8.50 per litre for three successive years. what approximately is the average cost per litre of diesel if he spends rs 4000 each year?​

Answer 1

Average cost per litre of diesel = rs 8.00

Explanation:

Amount spent on diesel each year = rs 4000

Price of a litre of diesel in the first year = rs 7.50

Price of a litre of diesel in the second year = rs 8.00

Price of a litre of diesel in the third year = rs 8.50

Average cost per litre of diesel =
`(p_(1) + p_(2) + p_(3) )/(n)`

where n is the number of years.

Average cost per litre of diesel =
`(7.5 + 8.00 + 8.50)/(3)`

=
`(24)/(3)`

= 8

Average cost per litre of diesel is rs 8.00

So that he buys an average of 500 (i.e
`(4000)/(8)`) litres every year.