Question

The sum of 2 natural numbers is 240 and they are in ratio 3 5. Find the numbers.

Answer 1

let the numbers be 3x and 5x
∴3x +5x = 240
⇒8x = 240
x = 30
therefore , the numbers are 90 and 150
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Answer 2

ratio of two numbers is 3:5
let,the 2 natural numbers be 3x and 5x
given,
3x+5x=240
8x=240
x=240/8
x=30

the 2 numbers are 
 3x=3×30=90
5x=5×30=150