Question

After being set up a pen factory manufactured 16000 pens in the 5th year and 20,500 pens in the 18th year.
Assuming that the production increases uniformly by a fixed number every year, find
i) The number of pens manufactured in the first year
ii) The total production in 10 years
iii) The production in the 7th ye

Answer 1

Step-by-step explanation:

let no of pens in the first year be a

and uniform increase be d

as per question....

a+4d=16000

a+17d=20500(-)

____________

13d=4500

d=300

a=16000-1200

a=14800 pens

10 years

a+9d

14800+2700

=17500 pens

7/2. (14800+17500)

7/2. (32300)

7. 16150

=113050pens

7th year

14800+1800

16600 pens

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