Question

A manufacturing of washing machine produced 500 sets in 3rd year and 1300 sets in 7th year then find
1) No of sets in 1st year
2)No of sets in 8th year
3)Total production in first 8 years.

Hey guys answer this plzz​ it's too important plzzz

Answer 1

Answer:

Hi, friend answer is attached in picture..

hope its help you..

3rd question's answer is ..

you have to find

$s_{8}()$

Answer 2

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