Question

two are in the ratio 3:5. if twice of their Sume is 320,find the numbers.​

Answer 1

Answer:

3 + 7 = 10 then 3/10 x 120 which equals 36

A more involved view:

Let ratio 3:7 = 3/7 = a/b This re-arranges to 3b =7a

b = 7/3. a

Note: a + b =120

By substitution 7/3.a + a =120

Solving for ‘a’ gives a result of 36 with “b” = 84

3b = 252 and 7a = 252 ( see my above note) means the 3:7 ratio holds