Question

the sum of three numbers i n A.P. is 30 and ratio of first number to the third is 3:7 . Find the number s

Answer 1

Answer:

i think you asked a it is 6

Step-by-step explanation:

ratio given is 3:7

a/a3 = 3/7

a/a+2d=3/7

7a=3(a+2d)

7a=3a+6d

4a=6d

2a=3d

d=2/3a

now s3

3/2(2a+2d)=30

3/2(2a+2x2/3a)=30

solve it and you get a=6

Answer 2

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