x : y = 5 : 6 হলে, 3x : 5y =?

A 3 : 5

B 1 : 2

C 6

D 15 : 30

Solution

Correct Answer: Option B

x : y = 5 : 6
⇒ x/y = 5/6
⇒ 3x/5y = (5 × 3)/(6 × 5)
[ 3/5 দ্বারা উভয় পক্ষকে গুণ করে]
⇒ 3x/5y = 1/2
∴ 3x : 5y = 1 : 2

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