Question

Each year , a tree grows 5cm less than it did the preceding year. If it grew by 1m in the first year , then in how many years will it have ceased growing ?? ...
Plz...answer it ....

Answer 1

hope this answer helps you

Answer 2

it will have ceased growing in 21 years.

this is an arithmetic progression.

a = 100cm (1m)
d= -5

tn = a + (n-1)d
tn = 0cm

0= 100 - 5n +5
5n = 105
n = 21

therefore it will have ceased growing in 21 years :((