Question

if 1/a:1/b:1/c=3:4:5, then find a:b:c​

Answer 1

Answer:

20:15:12

Step-by-step explanation:

Given 1/a : 1/b : 1/c = 3:4:5

Let the ratio be x as 3x:4x:5x

So, 1/a = 3x

a = 1/3x

Similarly,

b = 1/4x

c = 1/5x

Now, a : b : c = 1/3x : 1/4x : 1/5x

Taking L.C.M of 3,4 and 5, you get 60.

Multiply the whole ratio by 60,

1/3x*60 : 1/4x *60 : 1/5x * 60

= 20x : 15x : 12x

= 20:15:12

a:b:c = 20:15:12

Answer 2

Answer:

20 : 15 : 12 ................