Question

If x:y=3:5 find the ratio 3×+4y:8x +5y​

Answer 1

Answer:

29: 49

Step-by-step explanation:

Since x:y= 3:5,

$\frac{x}{y} = \frac{3}{5}$

Cross multiply:

$5x = 3y$

Divide by 5 on both sides:

$x = \frac{3}{5} y$

$\frac{3x + 4y}{8x + 5y} \\ = \frac{3( \frac{3}{5}y) + 4y }{8( \frac{3}{5}y) + 5y } \\ = \frac{ \frac{9}{5}y + 4y }{ \frac{24}{5}y + 5y } \\ = \frac{9y + 5(4y)}{24y + 5(5y)} \\ = \frac{9y + 20y}{24y + 25y} \\ = \frac{29y}{49y} \\ = \frac{29}{49}$

Thus, 3x+4y: 8x+5y= 29: 49.

Answer 2

I had to try a couple of times to get the answer. The answer is of ratio 29:49