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Question
The ratio of three numbers is 3 : 4 : 5 and the sum of their squares is 1250. The sum of the numbers is :
30
50
60
90
ANSWER : 3
Descrption
<p>Hints: ধরি, সংখ্যাগুলো 3x, 4x, 5x</p> <p>এখন, (3x)<sup>2</sup> + (4x)<sup>2</sup> + (5x)<sup>2</sup> = 1250</p> <p> 50x<sup>2</sup> = 1250 </p> <p>x<sup>2</sup> = 25</p> <p>x = 5 </p> <p>তাহলে, sum = 3x + 4x + 5x = 12x = 12 × 5 = 60</p>
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