Question

Two numbers are such that the ratio between them us 3:5, but if each is increased by 10, the ratio between them becomes 5:7. What are the numbers?

a. 3,5
b. 7,9
c. 13,22
d. 15,75​

Answer 1

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→ If each number in increased by 10, the ratio between the new number so formed is 5 : 7. A/Q, ∵ ( x + 10 ) : ( y + 10 ) = 5 : 7 . ⇒ 7( x + 10 ) = ( y + 10 ) 5 .