The sum of the squares of three numbers is 336 and the ratio of the first and the second and also of the second and the third is number 1 : 2. Then find the difference between the third and first number?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is Option 3 i.e. 12
| Understanding | Application |
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Suppose the numbers are x, 2x and 4x According to the question: x2 + 4x2 + 16x2 = 336 21x2 = 336 x2 = 16 So, x = 4 |
Difference of third and first number = 16 – 4 = 12 |