Question

3.
If a : b = 3:4 and b:c = 12:13,
then find a :c.​

Answer 1

Answer:

a:b = 3:4

b:c = 12:13

b is common

lcm of b = lcm of 4 and 12 = 12

a:b = 3:4 = 3*3 : 4*3 = 9:12       ( equivalent ratios )

a:b:c = 9:12:13

a:c = 9:13

Answer 2

Answer:

see the full image

sorry answer save karne ke liye mene solve kiya aur screen shot nikala

but answer disable hua isliye screenshot diya hai

hope it will help you simple way

hence 9 : 13