a : b = 4 : 7 এবং b : C = 5 : 6 হইলে a : b : c =কত?   

A    4 : 7 : 6

B    20 : 35 : 24

C    20 :35 : 42

D    24 : 35 : 30 

Solution

Correct Answer: Option C

 

a:b=4:7=20:35 [ 5 দ্বারা গুণ করে ] b:c= 5:6= 35:42 [ 7 দ্বারা গুণ করে ]

a:b:c= 20:35:42

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