11. Two numbers are in the ratio 4 : 5. If 5 is added to each number, the ratio becomes 13:16. Find the numbers.
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Step-by-step explanation:
let the number=4x and 5x
(4x+6)/(5x+6)=13/16
64x+96=65x+78
x=96-78=18
so the two numbers are 72 and 90
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