Question

a person increases his running distance by half kilometer every day.on the first day he runs 5 kilometer.what is the distance he runs on 25th day

Answer 1

This is question of Arithmetic Progression

Let a= 5 d=0.5 n= 25

:. an = a +(n-1)d
= 5 +(25-1)0.5
=> an = 60km