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Question
The sum of two numbers is 45 and one is twice the other. What is the smaller number?
The sum of two numbers is 45 and one is twice the other. What is the smaller number?
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Solution
The correct option is A 15
x + y = 45 …..(i)
x = 2y..(ii)
substituting from (ii) into (i) , we have
y + 2y = 45
3y = 45 ⇒ y = 15
From (i) : x + 15 = 45⇒x = 45 – 15 = 30
So, the smaller number is 15 and the larger number is 30
15
x + y = 45 …..(i)
x = 2y..(ii)
substituting from (ii) into (i) , we have
y + 2y = 45
3y = 45 ⇒ y = 15
From (i) : x + 15 = 45⇒x = 45 – 15 = 30
So, the smaller number is 15 and the larger number is 30
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