Question

the compound ratio of 1.2:2.5,2.1:3.2 and 5:3

Answer 1

Answer:

21 : 40

Step-by-step explanation:

Ratio = 1.2 : 2.5,  2.1 : 3.2  and 5 : 3

Compound Ratio = (1.2 x 2.1 x 5) : (2.5 x 3.2 x 3)

Compound Ratio = 12.6 : 24

Simplify the ratio:

Ratio = 12.6 : 24

Multiply by 10:

Ratio = 126 : 240

Divide by 6:

Ratio = 21 : 40

Answer: The compound ratio is 21 : 40

Answer 2

Answer:

21: 40

Step-by-step explanation:

we know that in compound ratio when we have three quantities to find the ratio i.e.

a:b , c:d, e:f then this will be equal to ace : bdf

In the question the ratios given are

1.2 : 2.5 , 2.1:3.2 , and 5:3

By the above definition it would be equal to

(1.2) * (2.1) * (5) : (2.5) * (3.2) * (3)

which will be equal to

12.6 : 24

∴ $\frac{126}{10} :24$

Multiplying both sides by 10

∴ $\frac{126*10}{10} :24*10$

∴ 126:240

dividing both sides by 6 gives us

∴ 21:40