Question

In November 2009, the number of visitors to a zoo increased daily by 20. If a total of 12300 people visited the zoo in that month, the number of visitors on 1st November 2009.

Answer 1

u can consider it as a AP sequence.. and proceed

Answer 2

yes i know.

Answer 3

but not getting the answer. can you jsut show how to do it?

Answer 4

hmmm ok

Answer 5

i got it

Answer 6

thanks

Answer 7

i got the answer its 120

Answer 8

consider the number of people going to that zoo first day are x

next day it will be x+20,....

so the seq will be
x,x+20,x+40.x+60.....

november has 30 days

you know that sum of terms S= a + (n-1) d
a = first term in the series
s = sum of n terms
n = number of terms
d = difference between the terms

here s = 12300
a = x
n = 30
d = 20

substitute and solve to find x

Answer 9

i got it i got it

Answer 10

thanks

Answer 11

its ok..:)