Question

Two number are in the ratio 3:5. If each is increasd by 10,the rattio between the new numbers so formed is 5:7.find the original number.​

Answer 1

Answer:

let the numbers be 3x and 5x

new numbers will be 3x+10 and 5x+10

3x+10/5x+10=5/7

cross multiply

21x+70=25x+50

-4x=-20

X=5

number 1 is 15

number 2 is 25

Step-by-step explanation:

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Answer 2

let first two numbers be 3x and 5x

let other two numbers be 5x and 7x

according to question equation=

3x+10/5x+10=5x÷7x

7x(3x+10)=5x(5x+10)

21x^2+70x=25x^2+50x

70x-50x=25^2-21x^2

20x=4x^2

20x÷4x=x

therefore x=5

so, original number=3x=3×5=15

=5x=5×5=25