Question

find the compound ratio of 4:5 and 4:5

Answer 1

1. Compounded ratio: For two or more ratios, if we take antecedent as product of antecedents of the ratios and consequent as product of consequents of the ratios, then the ratio thus formed is called mixed or compound ratio. As, compound ratio of m : n and p :  q is mp : nq.

In other words,

When two or more ratios are multiplies termwise; the ratio thus obtained is called compound ratio.

For example:

The compounded ratio of the two ratios a : b and c : d is the ratio ac : bd, and that of a : b, c : d and e : f is the ratio ace : bdf.

For ratios m : n and p :  q; the compound ratio is (m × p) : (n × q).

For ratio m : n, p :  q and r : s; the compound ratio is (m × p × r) : (n × q × s).



so your answer is ...

4:5 and 4:5
(4×4) : (5×5)
(16) : (25)
16 : 25

hope it is useful....
mark as brainliest....

Answer 2

Answer:

The compound ratio is 16 : 25.

Step-by-step explanation:

Given : Ratio 4:5 and 4:5.

To find : The compound ratio?

Solution :

Compound ratio for the ratios x : y and a : b is defined as the multiple of a and x ratio multiple of y and b i.e. $x\times a : y\times b$

Applying in the given ratio, x=4,y=5,a=4 and b=5

$x\times a : y\times b$

$4\times 4 : 5\times 5$

$16 : 25$

Therefore, The compound ratio is 16 : 25.