Question

EXERCISE 5.1
1. In which of the following situations, does the list of numbers involved make an arithmetic
progression, and why?
6) The taxi fare after each km when the fare is 15 for the first km and 28 for each
additional km.
(11) The amount of air present in a cylinder when a vacuum pump removes of the
air remaining in the cylinder at a time.
(ii) The cost of digging a well after every metre of digging, when it costs *150 for
the first metre and rises by 50 for each subsequent metre.
(iv) The amount of money in the account every year, when 10000 is deposited at
compound interest at 8 % per annum.
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Answer 1

so,as there is the common difference 28 and fist term is 15 and another terms will be 33, 61,89... thus, it is forming an A.P