Two numbers are in the ratio 2 : 3. If their L.C.M. is 48. what is sum of the numbers?A. 28 B. 40C. 64 D. 42
Question
Two numbers are in the ratio 2 : 3.
If their L.C.M. is 48, what is the sum of the numbers?
A. 28
B. 40
C. 64
D. 42
Solution
To solve this problem, we need to understand that the LCM (Least Common Multiple) of two numbers in a ratio is equal to the product of the ratio and the highest number in the ratio.
Step 1: The ratio given is 2:3. This means the numbers are 2x and 3x, where x is a common multiplier.
Step 2: The LCM of the two numbers is given as 48. Since the LCM of two numbers in a ratio is the product of the ratio and the highest number in the ratio, we can set up the equation 2x * 3x = 48.
Step 3: Simplifying the equation gives 6x^2 = 48. Solving for x, we get x^2 = 48/6 = 8, so x = sqrt(8) = 2.83 (approximately).
Step 4: Now that we know x, we can find the two numbers. They are 2x = 22.83 = 5.66 (approximately) and 3x = 32.83 = 8.49 (approximately).
Step 5: The sum of the two numbers is 5.66 + 8.49 = 14.15 (approximately).
However, none of the options (A. 28, B. 40, C. 64, D. 42) match this result. There seems to be a mistake in the problem or the answer choices.
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