Question

A manufacture of Tv sets produced 600 in the 3rd year &700 sets in the seventh year , assuming that the production increases uniformly by a fixed number every year find
the production in the 1st year
the production in the 10th year
the total production in first 7 year explain step by step​

Answer 1

Step-by-step explanation:

Let the number of sets produced in 1st year be 'a' and 'd' be the increase in production every year.

We are given,a+2d= 600 ----- (1)

anda+6d= 700 ----- (2)

subtracting equation (1) from (2), we get

4d= 100 ord= 25

Substituting d=25 in equation (1), we get

a= 550

(a) Production in the first year =a= 550

(b) Production in 10th year = a+ 9d = 550+9 x25 =775

(c) Total production in first 7 years = a+ (a+d)+(a+2d)+.....+(a+6d)

7/2

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

4375

Answer 2

Hope this helps u

Refer the below attachment