a village have 4000 literate people in year 2010 and this number increases by 400 per year .how many literate people will be there till the year 2020?find the formula to know the number of literate people in n years?
Answers
Answered by
6
HY
FRIEND
YOUR WORK IS TO MARK AS BRAINLIST AND FOLLOW ME
NOW MY WORK
IN YEAR 2010,
NO. OF POPULATION = 4000
IN YEAR 2020,
NO. OF POPULATION = no. of year lefted into no. of people per year + 4000
a. t. q
=10into 400+4000
=8000 person in year 2020
thanks
your regard
shreyansh
FRIEND
YOUR WORK IS TO MARK AS BRAINLIST AND FOLLOW ME
NOW MY WORK
IN YEAR 2010,
NO. OF POPULATION = 4000
IN YEAR 2020,
NO. OF POPULATION = no. of year lefted into no. of people per year + 4000
a. t. q
=10into 400+4000
=8000 person in year 2020
thanks
your regard
shreyansh
Answered by
12
by using the formula of ap we can solve this as
ap becomes 4000,4400,4800...........,x
an= a+(n-1)d
= 4000 + 9 × 400
= 7600
therefore,
sn = n/2×(a+l)
=10/2(4000+7600)
=5×11600
=58000
therefore, there will be 58000 literate people in the village by 2020
ap becomes 4000,4400,4800...........,x
an= a+(n-1)d
= 4000 + 9 × 400
= 7600
therefore,
sn = n/2×(a+l)
=10/2(4000+7600)
=5×11600
=58000
therefore, there will be 58000 literate people in the village by 2020
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