If `a:b:c=2:3:4,` find a,b and c

(i) If a:b:c= 2:3:4 and s=27 inches, find the area of the triangle ABC. (ii) If in a triangle ABC, a=6, b=3 and cos(A-B) =4/5 then find its area.

a:b::2:3,b :c::4:5, find a:b:c.

If a:b:c=2:3:4, then (1)/(a):(1)/(b):(1)/(c) is equal to (1)/(4):(1)/(3):(1)/(2) b.4:3:2 c.6:4:3 d.none of these

If a:b = 5:6 and b:c = 3:4, then find a:b:c.

If a:b=3:5 and b:c=6:7 ,find a:b:c

If A:B=4:9 and A:C=2:3 , find B:C and A:B:C

If a:b=2:3 and b:c=5:7 then find a:c and a:b:c