Question

Two numbers are in the ratio 5:7 .If the sum of the numbers is 720, find the numbers .

Answer 1

first no is 5x
second no is 7x
=>
5x+7x=720
12x=720
x=60
first no is 5x=300
second no is 7x=420

Answer 2

let the ratio 5:7 be = 5x : 7x
so 5x+7x = 12x
x = 720/12
= 60


x = 60 so 5x = 5*60
= 300
x = 60 so7x = 7* 60
= 420

ans. 5:7 = 420:300
= 420/300
= 21:15


ans. 420:300. or. 21:15


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