a:b=2:3 এবং b:c=6:7 হলে a:c=কত?

a:b=2:3 এবং b:c=6:7 হলে a:c=কত?

A 2:6

B 3:7

C 2:7

D 4:7

Solution

Correct Answer: Option D

a:b=2:3=12:18
b:c=6:7=18:21
a:b:c=12:18;21
a:c=12:21=4:7