Question

A flower bed has 12 rows. There are 275 plants in each row. How many plants are there in the entire flower bed.​

Answer 1

Answer:

The number of rose plants in first, second third,..., and last row are respectively.

23,21,19,....,5.

Let the number of rows of rose plants n.

The sequence 23,21,19,....,5 is an A.P. with first term a(=23), common difference d(=−2) and n

th

term (=5).

∴a

n

=a+(n−1)d

⟹5=23+(n−1)×−2

⟹5=23−2n+2⟹20=2n⟹n=10

Hence, there are 10 rows of rose plants.

Answer 2

Answer:

A flower bed has 12 rows. There are 275 plants in each row. How many plants are there in the entire flower bed.

answer is 3300 flowers