Question

21. If x: y = 3: 4, find (3x + 4y): (5x + 6y).

please fast answer I will mark you brain list answer ​

Answer 1

Answer: Correct option is B)

Put x=3y=4

(3x+4y):(5x+6y)=(3×3+4×4):(5×3+6×4)

=(9+16):(15+24)

=25:39

Explanation: