যদি a : b = 2 : 3 এবং b : c = 6: 7 হয়, তবে a : c = কত?

যদি a : b = 2 : 3 এবং b : c = 6: 7 হয়, তবে a : c = কত?

A 2:6

B 3:7

C 2:7

D 4:7

Solution

Correct Answer: Option D

a:b = 2:3= (2×6):(3x6)=12:18

এবং, b:c = 6:7= (6x3):(7x3)=18:21

a : c = 12:21= 4:7