Question

If a : b=3 : 5 and b:c=2: 7, find a : c. Also find a : b:c.​

Answer 1

Answer:

a/b=3/5. b/c=2/7

lcm of two values of b (5,2)=10

a/b=3*2/5*2=6/10

b/c=2*5/7*5=10/35

a:c=6:35

a:b:c=6:10:35

Step-by-step explanation:

thanks all all my answer

Answer 2

Answer :

a : b : c = 21 : 25 : 35.

Given :

• a : b = 3 : 5
• b : c = 2 : 7

To find :

• a : b: c.​

Solution :

⇒ Let's write the ratios as fraction.

a/b = 3/5

b/c = 2/7

⇒ Let's find the LCM of denominators.

LCM of 5 and 7 = 35

a/b = 3 × 7/5 × 7

=21/35

b/c = 2 × 5/7 × 5

= 10/35

a = 21

b = 25

c = 35

a : b : c = 21 : 25 : 35

• Therefore, a : b : c is 21 : 25 : 35.