Question

If a:b:c=2:3:5 then find value of (a2+b2+c2) / (ab+bc+ca)​

Answer 1

Answer:

if a:b:c:=2:3:5

than a is 2x

b is 3x

c is 5x

then a² +b²+c²= (2x)²+(3x)²+(5x)²=4x²+9x²+25x²=38x²

and ab+bc+ca=6x²+15x²+10x²=31x²

then 38x²/31x²=38/31=1.22580

ANSWER=1.25580