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Question

If x : y = 2 : 5 , then find 3x : 5y


A

5 kg

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B

6 : 25

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C

2 : 3

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D

12 : 20

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Solution

The correct option is B

6 : 25


Given that x : y = 2 : 5

xy = 25 ______________ (1)

Since we need to find 3x : 5y = 3x5y

Multiplying both sides of 1 by 35 , we have

35 × xy = 35 × 25

35 = 625

Hence 3x:5y = 6:25


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