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Question 188
When 3888 is divided by the square of a number and the answer so obtained is multiplied by 21, the final answer obtained is 252. What is the number ?
Solution
Let the number be $$x$$
Acc to ques,
=> $$\frac{3888}{x^2} \times 21 = 252$$
=> $$\frac{3888}{x^2} = 12$$
=> $$x^2 = \frac{3888}{12} = 324$$
=> $$x = \sqrt{324} = 18$$
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