Question

A manufacture of TV sets produced 600 sets in the third year and 700 sets in the seventh year. Assuming that the production increases uniformly by a fixed every year find 1) The production in the 10th year 2) The total production in first 7 years.

Answer 1

Step-by-step explanation:

we are given , a + 2 d = 600......(1)

and a+6d =700(2)

subtracting equation (1) from (2),

We get 4 d =100 ord =25

subtracting equation (1) from (2)

We get 4 d =100 ord =25 in equation (1), we get a=550

(a) production in the first year =a/= 550

(b) production in 10th year=a + 9d =155 0+9x25 =775

(c) total production in first 7years = a+ (a+d) + (a+2d) + (a+d)

7/2

(2* 550 + (7-1 ) 25)

4375 .

I hope this help you .